SetPrefix not available in SharedPreferencesAsync?

### What package does this bug report belong to?

shared_preferences

### What target platforms are you seeing this bug on?

Android, iOS, Web, macOS, Linux, Windows

### Have you already upgraded your packages?

Yes

### Dependency versions

<details><summary>pubspec.lock</summary>

```lock
# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
  async:
    dependency: transitive
    description:
      name: async
      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
      url: "https://pub.dev"
    source: hosted
    version: "2.11.0"
  boolean_selector:
    dependency: transitive
    description:
      name: boolean_selector
      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.1"
  characters:
    dependency: transitive
    description:
      name: characters
      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
      url: "https://pub.dev"
    source: hosted
    version: "1.3.0"
  clock:
    dependency: transitive
    description:
      name: clock
      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
      url: "https://pub.dev"
    source: hosted
    version: "1.1.1"
  collection:
    dependency: transitive
    description:
      name: collection
      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
      url: "https://pub.dev"
    source: hosted
    version: "1.18.0"
  fake_async:
    dependency: transitive
    description:
      name: fake_async
      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
      url: "https://pub.dev"
    source: hosted
    version: "1.3.1"
  ffi:
    dependency: transitive
    description:
      name: ffi
      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.3"
  file:
    dependency: transitive
    description:
      name: file
      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
      url: "https://pub.dev"
    source: hosted
    version: "7.0.0"
  flutter:
    dependency: "direct main"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_lints:
    dependency: "direct dev"
    description:
      name: flutter_lints
      sha256: "3f41d009ba7172d5ff9be5f6e6e6abb4300e263aab8866d2a0842ed2a70f8f0c"
      url: "https://pub.dev"
    source: hosted
    version: "4.0.0"
  flutter_test:
    dependency: "direct dev"
    description: flutter
    source: sdk
    version: "0.0.0"
  flutter_web_plugins:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.0"
  leak_tracker:
    dependency: transitive
    description:
      name: leak_tracker
      sha256: "3f87a60e8c63aecc975dda1ceedbc8f24de75f09e4856ea27daf8958f2f0ce05"
      url: "https://pub.dev"
    source: hosted
    version: "10.0.5"
  leak_tracker_flutter_testing:
    dependency: transitive
    description:
      name: leak_tracker_flutter_testing
      sha256: "932549fb305594d82d7183ecd9fa93463e9914e1b67cacc34bc40906594a1806"
      url: "https://pub.dev"
    source: hosted
    version: "3.0.5"
  leak_tracker_testing:
    dependency: transitive
    description:
      name: leak_tracker_testing
      sha256: "6ba465d5d76e67ddf503e1161d1f4a6bc42306f9d66ca1e8f079a47290fb06d3"
      url: "https://pub.dev"
    source: hosted
    version: "3.0.1"
  lints:
    dependency: transitive
    description:
      name: lints
      sha256: "976c774dd944a42e83e2467f4cc670daef7eed6295b10b36ae8c85bcbf828235"
      url: "https://pub.dev"
    source: hosted
    version: "4.0.0"
  matcher:
    dependency: transitive
    description:
      name: matcher
      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
      url: "https://pub.dev"
    source: hosted
    version: "0.12.16+1"
  material_color_utilities:
    dependency: transitive
    description:
      name: material_color_utilities
      sha256: f7142bb1154231d7ea5f96bc7bde4bda2a0945d2806bb11670e30b850d56bdec
      url: "https://pub.dev"
    source: hosted
    version: "0.11.1"
  meta:
    dependency: transitive
    description:
      name: meta
      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
      url: "https://pub.dev"
    source: hosted
    version: "1.15.0"
  path:
    dependency: transitive
    description:
      name: path
      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
      url: "https://pub.dev"
    source: hosted
    version: "1.9.0"
  path_provider_linux:
    dependency: transitive
    description:
      name: path_provider_linux
      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
      url: "https://pub.dev"
    source: hosted
    version: "2.2.1"
  path_provider_platform_interface:
    dependency: transitive
    description:
      name: path_provider_platform_interface
      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.2"
  path_provider_windows:
    dependency: transitive
    description:
      name: path_provider_windows
      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
      url: "https://pub.dev"
    source: hosted
    version: "2.3.0"
  platform:
    dependency: transitive
    description:
      name: platform
      sha256: "9b71283fc13df574056616011fb138fd3b793ea47cc509c189a6c3fa5f8a1a65"
      url: "https://pub.dev"
    source: hosted
    version: "3.1.5"
  plugin_platform_interface:
    dependency: transitive
    description:
      name: plugin_platform_interface
      sha256: "4820fbfdb9478b1ebae27888254d445073732dae3d6ea81f0b7e06d5dedc3f02"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.8"
  shared_preferences:
    dependency: "direct main"
    description:
      name: shared_preferences
      sha256: c272f9cabca5a81adc9b0894381e9c1def363e980f960fa903c604c471b22f68
      url: "https://pub.dev"
    source: hosted
    version: "2.3.1"
  shared_preferences_android:
    dependency: transitive
    description:
      name: shared_preferences_android
      sha256: a7e8467e9181cef109f601e3f65765685786c1a738a83d7fbbde377589c0d974
      url: "https://pub.dev"
    source: hosted
    version: "2.3.1"
  shared_preferences_foundation:
    dependency: transitive
    description:
      name: shared_preferences_foundation
      sha256: c4b35f6cb8f63c147312c054ce7c2254c8066745125264f0c88739c417fc9d9f
      url: "https://pub.dev"
    source: hosted
    version: "2.5.2"
  shared_preferences_linux:
    dependency: transitive
    description:
      name: shared_preferences_linux
      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
      url: "https://pub.dev"
    source: hosted
    version: "2.4.1"
  shared_preferences_platform_interface:
    dependency: transitive
    description:
      name: shared_preferences_platform_interface
      sha256: "57cbf196c486bc2cf1f02b85784932c6094376284b3ad5779d1b1c6c6a816b80"
      url: "https://pub.dev"
    source: hosted
    version: "2.4.1"
  shared_preferences_web:
    dependency: transitive
    description:
      name: shared_preferences_web
      sha256: d2ca4132d3946fec2184261726b355836a82c33d7d5b67af32692aff18a4684e
      url: "https://pub.dev"
    source: hosted
    version: "2.4.2"
  shared_preferences_windows:
    dependency: transitive
    description:
      name: shared_preferences_windows
      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
      url: "https://pub.dev"
    source: hosted
    version: "2.4.1"
  sky_engine:
    dependency: transitive
    description: flutter
    source: sdk
    version: "0.0.99"
  source_span:
    dependency: transitive
    description:
      name: source_span
      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
      url: "https://pub.dev"
    source: hosted
    version: "1.10.0"
  stack_trace:
    dependency: transitive
    description:
      name: stack_trace
      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
      url: "https://pub.dev"
    source: hosted
    version: "1.11.1"
  stream_channel:
    dependency: transitive
    description:
      name: stream_channel
      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
      url: "https://pub.dev"
    source: hosted
    version: "2.1.2"
  string_scanner:
    dependency: transitive
    description:
      name: string_scanner
      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
      url: "https://pub.dev"
    source: hosted
    version: "1.2.0"
  term_glyph:
    dependency: transitive
    description:
      name: term_glyph
      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
      url: "https://pub.dev"
    source: hosted
    version: "1.2.1"
  test_api:
    dependency: transitive
    description:
      name: test_api
      sha256: "5b8a98dafc4d5c4c9c72d8b31ab2b23fc13422348d2997120294d3bac86b4ddb"
      url: "https://pub.dev"
    source: hosted
    version: "0.7.2"
  vector_math:
    dependency: transitive
    description:
      name: vector_math
      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
      url: "https://pub.dev"
    source: hosted
    version: "2.1.4"
  vm_service:
    dependency: transitive
    description:
      name: vm_service
      sha256: f652077d0bdf60abe4c1f6377448e8655008eef28f128bc023f7b5e8dfeb48fc
      url: "https://pub.dev"
    source: hosted
    version: "14.2.4"
  web:
    dependency: transitive
    description:
      name: web
      sha256: d43c1d6b787bf0afad444700ae7f4db8827f701bc61c255ac8d328c6f4d52062
      url: "https://pub.dev"
    source: hosted
    version: "1.0.0"
  xdg_directories:
    dependency: transitive
    description:
      name: xdg_directories
      sha256: faea9dee56b520b55a566385b84f2e8de55e7496104adada9962e0bd11bcff1d
      url: "https://pub.dev"
    source: hosted
    version: "1.0.4"
sdks:
  dart: ">=3.5.0 <4.0.0"
  flutter: ">=3.22.0"

```

</details>


### Steps to reproduce

SharedPreferencesAsync() does not have a way to set prefix. 
Forced to used old legacy to get keys without the "flutter." prefix

### Expected results

Function to actually set prefix or a maybe a SharedPreferencesOptions() to set the prefix when created?

### Actual results

Can only read "ordinary" keys

### Code sample

<details open><summary>Code sample</summary>

```dart
//No sample provided
```

</details>


### Screenshots or Videos

<details open>
<summary>Screenshots / Video demonstration</summary>
</details>


### Logs

<details open><summary>Logs</summary>

```console
//No log to provide
```

</details>


### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
flutter doctor -v
[✓] Flutter (Channel stable, 3.24.0, on macOS 14.5 23F79 darwin-arm64, locale en-NO)
    • Flutter version 3.24.0 on channel stable at /Users/large/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 80c2e84975 (13 days ago), 2024-07-30 23:06:49 +0700
    • Engine revision b8800d88be
    • Dart version 3.5.0
    • DevTools version 2.37.2

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/large/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15F31d
    • CocoaPods version 1.13.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)

[✓] Connected device (5 available)
    • sdk gphone64 arm64 (mobile)     • emulator-5554                        • android-arm64  • Android 14 (API 34) (emulator)
    • iPhone 15 Pro Max (mobile)      • A82C2902-7F6A-4187-B717-5A29044BA3F3 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-17-5 (simulator)
    • macOS (desktop)                 • macos                                • darwin-arm64   • macOS 14.5 23F79 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad                • darwin         • macOS 14.5 23F79 darwin-arm64
    • Chrome (web)                    • chrome                               • web-javascript • Google Chrome 127.0.6533.100

[✓] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>


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Uh oh!

SetPrefix not available in SharedPreferencesAsync? #153293

What package does this bug report belong to?

What target platforms are you seeing this bug on?

Have you already upgraded your packages?

Dependency versions

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Videos

Logs

Flutter Doctor output

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

SetPrefix not available in SharedPreferencesAsync? #153293

Description

What package does this bug report belong to?

What target platforms are you seeing this bug on?

Have you already upgraded your packages?

Dependency versions

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Videos

Logs

Flutter Doctor output

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions