Prepares camera package for pigeon Swift migration as part of flutter/flutter#119109

Current implementation of `FormatUtils.selectBestFormat` overrides `MediaSettings.framesPerSecond`. With swift pigeon contracts `MediaSettings` is non mutable so that will no longer be possible.

## Pre-Review Checklist

**Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Replaces the Obj-C example app with Swift. Rather than attempt to modify the example in place, I started clean from the Swift template:
- deleted the ios/ directory.
- ran `flutter create --platforms=ios .` using current `stable` (3.38.9).
- re-did the [RunnerUITest setup process](https://github.com/flutter/flutter/blob/master/docs/ecosystem/testing/Plugin-Tests.md#enabling-xcuitests), and swapped in the existing test files for that and RunnerTest.
- ran native tests and the example app to capture the auto-migration steps for CocoaPods.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Roll Flutter from f916dd6887bf to e8f9dc50356d (34 revisions)

flutter/flutter@f916dd6...e8f9dc5

2026-02-08 engine-flutter-autoroll@skia.org Roll Skia from 9325111e6ee4 to b7db9f35f0f2 (1 revision) (flutter/flutter#182062)
2026-02-08 engine-flutter-autoroll@skia.org Roll Skia from 3167229206b5 to 9325111e6ee4 (1 revision) (flutter/flutter#182061)
2026-02-08 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from sYqpDF9l9-kldd9_Q... to iqtwdXlgKIyZkL5Li... (flutter/flutter#182058)
2026-02-08 engine-flutter-autoroll@skia.org Roll Skia from ae78024b261e to 3167229206b5 (1 revision) (flutter/flutter#182055)
2026-02-07 engine-flutter-autoroll@skia.org Roll Dart SDK from ad6368edbe02 to 965b51c219d3 (1 revision) (flutter/flutter#182050)
2026-02-07 engine-flutter-autoroll@skia.org Roll Skia from a471f253b941 to ae78024b261e (1 revision) (flutter/flutter#182049)
2026-02-07 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from IOzzhWfhdzhu3zHsz... to sYqpDF9l9-kldd9_Q... (flutter/flutter#182043)
2026-02-07 engine-flutter-autoroll@skia.org Roll Dart SDK from 02092faa97c5 to ad6368edbe02 (2 revisions) (flutter/flutter#182040)
2026-02-07 engine-flutter-autoroll@skia.org Roll Skia from 9a983f6c2c06 to a471f253b941 (24 revisions) (flutter/flutter#182039)
2026-02-07 30870216+gaaclarke@users.noreply.github.com Add buffer around rerasterized input to fragment shaders to maintain coordinate space when clipped (flutter/flutter#181743)
2026-02-07 737941+loic-sharma@users.noreply.github.com Update Flutter's style guide for dot shorthands and extension methods (flutter/flutter#181934)
2026-02-06 jason-simmons@users.noreply.github.com Manual roll Skia from 39aa2a70213a to 9a983f6c2c06 (flutter/flutter#181986)
2026-02-06 47866232+chunhtai@users.noreply.github.com Update doc in foundation to match the style guide (flutter/flutter#181972)
2026-02-06 engine-flutter-autoroll@skia.org Roll Dart SDK from ec674bdb3ae4 to 02092faa97c5 (11 revisions) (flutter/flutter#182017)
2026-02-06 engine-flutter-autoroll@skia.org Roll Packages from c197455 to 7805d3e (4 revisions) (flutter/flutter#182016)
2026-02-06 98614782+auto-submit[bot]@users.noreply.github.com Reverts "[cupertino.dart] Implement CupertinoMenuAnchor and CupertinoMenuItem using RawMenuAnchor (#174695)" (flutter/flutter#182010)
2026-02-06 iinozemtsev@google.com Update Dart SDK to 3.12 beta1 (flutter/flutter#181948)
2026-02-06 59215665+davidhicks980@users.noreply.github.com [cupertino.dart] Implement CupertinoMenuAnchor and CupertinoMenuItem using RawMenuAnchor (flutter/flutter#174695)
2026-02-06 116356835+AbdeMohlbi@users.noreply.github.com `flutter_tool` : Remove redundant enum types inside the enum definition scope (flutter/flutter#181910)
2026-02-06 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181973)
2026-02-05 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from J2QdLcY2gyt4NP_xV... to IOzzhWfhdzhu3zHsz... (flutter/flutter#181971)
2026-02-05 sstrickl@google.com Directly generate a Mach-O dynamic library using gen_snapshot. [reland] (flutter/flutter#181539)
2026-02-05 matej.knopp@gmail.com macOS: Implement tooltip window controller (flutter/flutter#180895)
2026-02-05 victorsanniay@gmail.com Constrain RawAutocomplete options by soft keyboard (flutter/flutter#181930)
2026-02-05 engine-flutter-autoroll@skia.org Roll Skia from 079d092f49e6 to 39aa2a70213a (1 revision) (flutter/flutter#181970)
2026-02-05 285025525@qq.com perf: web ui loadFontFromList (flutter/flutter#181440)
2026-02-05 vs.ashoknarayan@gmail.com Improve accessibility contrast for pre-test message (flutter/flutter#180469)
2026-02-05 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#181965)
2026-02-05 engine-flutter-autoroll@skia.org Roll Skia from 8543ce512d5c to 079d092f49e6 (8 revisions) (flutter/flutter#181964)
2026-02-05 50643541+Mairramer@users.noreply.github.com Add `clearError` API to Form and FormFieldState (flutter/flutter#180752)
2026-02-05 okorohelijah@google.com Bump minimum required Xcode version to 15 and recommended to 16 (flutter/flutter#180531)
2026-02-05 GiancarloCante@gmail.com Rename "widgetTester" parameter to "tester" in "WidgetTesterCallback" (flutter/flutter#180944)
2026-02-05 engine-flutter-autoroll@skia.org Roll Packages from 3bddf2c to c197455 (3 revisions) (flutter/flutter#181962)
2026-02-05 jason-simmons@users.noreply.github.com Temporarily remove the Pixel 9/API 36 device from the Firebase Test Lab tests. (flutter/flutter#181956)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages
Please CC stuartmorgan@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

...