fix android deeplink activation

[ajpinedam]

GitHub Issue: closes #22300

PR Type:

• 🐞 Bugfix

What is the current behavior? 🤔

What is the new behavior? 🚀

PR Checklist ✅

Please check if your PR fulfills the following requirements:

• 📝 Commits must be following the Conventional Commits specification.
• 🧪 Added Runtime tests, UI tests, or a manual test sample for the changes have been added (for bug fixes / features) (if applicable)
• 📚 Docs have been added/updated which fit documentation template (for bug fixes / features)
• 🖼️ Validated PR Screenshots Compare Test Run results.
• ❗ Contains NO breaking changes

Other information ℹ️

[Copilot]

Pull request overview

This PR fixes Android deeplink activation by ensuring that protocol activation events are properly handled on Android Skia builds. The fix addresses the issue where deeplinks received before the application is fully running would not trigger the OnActivated event correctly.

Key changes:

• Enables ProtocolActivatedEventArgs constructor across all platforms by removing platform-specific conditional compilation
• Implements deferred protocol activation for Android Skia using a ThreadStatic storage mechanism
• Updates generated code to reflect the platform availability changes

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/Uno.UWP/Generated/3.0.0.0/Windows.ApplicationModel.Activation/ProtocolActivatedEventArgs.cs	Simplifies conditional compilation directives from multi-platform checks to #if false, effectively disabling the generated implementations in favor of the partial class implementations
src/Uno.UWP/ApplicationModel/Activation/ProtocolActivatedEventArgs.cs	Removes __APPLE_UIKIT__ || __ANDROID__ || __WASM__ conditional compilation, making the constructor available on all platforms including Android Skia
src/Uno.UI/UI/Xaml/NativeApplication.cs	Adds Android Skia-specific logic to defer protocol activation when the app is not yet running, storing the URI for later activation
src/Uno.UI/UI/Xaml/Application.skia.cs	Introduces _activationUri ThreadStatic field and SetActivationUri method to store deferred activation URIs, then triggers OnActivated after OnLaunched completes on Android

Comments suppressed due to low confidence (1)

src/Uno.UWP/ApplicationModel/Activation/ProtocolActivatedEventArgs.cs:30

• The platform-specific conditional compilation directive has been removed, making this constructor available on all platforms. However, there's no corresponding test coverage to verify that deeplink activation works correctly across all platforms, especially for the Android Skia scenario this PR is fixing. Consider adding runtime tests in the Uno.UI.RuntimeTests project to verify protocol activation behavior, particularly testing the deferred activation scenario where the app is not running when the deeplink is received.

		/// <summary>
		/// Internal-only constructor for protocol activation.
		/// </summary>
		/// <param name="uri">Activated uri.</param>
		/// <param name="previousExecutionState">Previous execution state.</param>
		internal ProtocolActivatedEventArgs(Uri uri, ApplicationExecutionState previousExecutionState)
		{
			Uri = uri;
			PreviousExecutionState = previousExecutionState;
		}

[unodevops]

🤖 Your WebAssembly Skia Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-22301/wasm-skia-net9/index.html

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-22301/docs/index.html

[ajpinedam]

This is a WA until @MartinZikmund PR is merged #20027 which is fixing/updating the app activation for both iOS and Android

[ajpinedam]

/unobot backport release/stable/6.4