Add SDK license acceptance support (move from android-platform-support)

[rmarinho]

Summary

Add SDK license acceptance support to Xamarin.Android.Tools.AndroidSdk for unattended/CI scenarios across all .NET Android tooling.

Background

The android-platform-support (internal) repository has AndroidLicensesStorage with battle-tested license acceptance that:

• Orchestrates sdkmanager --licenses as a subprocess
• Handles interactive Y/N prompts and sends acceptance answers
• Writes license hashes to \/licenses/ directory
• Supports both Google and VS license formats
• Handles platform differences (sdkmanager.bat on Windows vs sdkmanager on macOS/Linux)
• Validates that Android SDK, Java SDK, and cmdline-tools paths exist before proceeding

This capability should be moved to the public Xamarin.Android.Tools.AndroidSdk package.

Proposed API Surface

• LicenseManager.AcceptAllAsync(sdkPath) — accept all pending SDK licenses via sdkmanager --licenses
• LicenseManager.IsAccepted(sdkPath, licenseId) — check if a specific license is accepted
• LicenseManager.GetPendingAsync(sdkPath) — list licenses that need acceptance

Consumer

• MAUI DevTools CLI (maui android sdk accept-licenses, maui android install --accept-licenses) — see MAUI DevTools Spec PR
• CI/CD pipelines — unattended builds that need to accept licenses without user interaction

Related

• MAUI DevTools spec §6.8: Shared Libraries & Code Reuse

[rmarinho]

Implementation Progress

I've implemented partial support for this issue as part of MAUI DevTools work:

✅ Implemented: Basic license acceptance

csharp // In SdkManagerRunner class public async Task<ToolRunnerResult> AcceptLicensesAsync(CancellationToken cancellationToken = default) { // Runs: sdkmanager --licenses // Sends ""y"" to stdin to accept all licenses }

This handles the common ""accept all licenses"" use case for CI/CD.

❌ NOT Implemented

The full API surface from this issue is not yet implemented:

• LicenseManager.IsAccepted(sdkPath, licenseId) — check specific license status
• LicenseManager.GetPendingAsync(sdkPath) — list licenses needing acceptance

What's needed to complete this issue

1. Parse <SDK>/licenses/ directory to check accepted license hashes
2. Compare against known license IDs to determine pending status
3. Potentially parse sdkmanager --licenses output to get license text/IDs

Code location

Current implementation in SdkManagerRunner.AcceptLicensesAsync():

• src/Xamarin.Android.Tools.AndroidSdk/Runners/SdkManagerRunner.cs