Summary

Add SDK bootstrap and management capabilities to Xamarin.Android.Tools.AndroidSdk so that consumers can programmatically set up an Android SDK from scratch and manage packages via sdkmanager.

Background

The android-platform-support (internal) repository has AndroidSDKInstaller with a full SDK install pipeline. For the public package, we want a simpler approach:

1. Bootstrap: Download and unzip Android command-line tools from the manifest feed (no hardcoded URLs)
2. Manage: Use the extracted sdkmanager CLI for package install/uninstall/list/update operations

This is needed by MAUI DevTools CLI (maui android install, maui android sdk install/list/uninstall).

Proposed API Surface

• SdkManager.BootstrapAsync(targetPath) — download command-line tools from manifest feed, SHA-1 verify, unzip to cmdline-tools/latest/
• SdkManager.InstallAsync(packages) — invoke sdkmanager to install packages
• SdkManager.UninstallAsync(packages) — invoke sdkmanager to uninstall packages
• SdkManager.ListAsync() — list installed and available packages
• SdkManager.UpdateAsync() — update all installed packages

Bootstrap Flow

1. Read manifest feed → resolve command-line tools URL + SHA-1 checksum for current OS/arch
2. Download & verify command-line tools archive
3. Unzip to \/cmdline-tools/latest/
4. Use the now-available sdkmanager for all subsequent operations

Manifest Feeds

• Xamarin Android Manifest: https://aka.ms/AndroidManifestFeed/d{version} — command-line tools, platform-tools, emulator
• Google SDK Repository: https://dl.google.com/android/repository/repository2-3.xml — platforms, build-tools, system images

All downloads must be SHA-1 verified against manifest checksums before installation.

Consumer

• MAUI DevTools CLI — see MAUI DevTools Spec PR

Related

• MAUI DevTools spec §6.8: Shared Libraries & Code Reuse
• MAUI DevTools spec §6.8.1: Manifest-Driven Downloads & Checksum Verification