Wire up scene life cycle events

[PureWeen]

Description of Change

When we added scenes we didn't add the relevant life cycle hooks related to scenes. This means that most of the xplat window events on iOS currently aren't firing

Issues Fixed

Fixes #9476

API Changes

Maui.Core

namespace Microsoft.Maui.LifecycleEvents
{
	public static class iOSLifecycle
	{
		// Scene
		public delegate void SceneWillEnterForeground(UIScene scene);
		public delegate void SceneOnActivated(UIScene scene);
		public delegate void SceneOnResignActivation(UIScene scene);
		public delegate void SceneDidEnterBackground(UIScene scene);
		public delegate bool SceneOpenUrl(UIScene scene, NSSet<UIOpenUrlContext> urlContexts);
		public delegate bool SceneContinueUserActivity(UIScene scene, NSUserActivity userActivity);
		public delegate void SceneWillContinueUserActivity(UIScene scene, string userActivityType);
		public delegate void SceneDidFailToContinueUserActivity(UIScene scene, string userActivityType, NSError error);
		public delegate void SceneDidUpdateUserActivity(UIScene scene, NSUserActivity userActivity);
		public delegate void SceneRestoreInteractionState(UIScene scene, NSUserActivity stateRestorationActivity);
	}
}

namespace Microsoft.Maui
{
	[System.Runtime.Versioning.SupportedOSPlatform("ios13.0")]
	[System.Runtime.Versioning.SupportedOSPlatform("tvos13.0")]
	public class MauiUISceneDelegate : UIResponder, IUIWindowSceneDelegate
	{
		[Export("sceneWillEnterForeground:")]
		public virtual void WillEnterForeground(UIScene scene);

		[Export("sceneDidBecomeActive:")]
		public virtual void OnActivated(UIScene scene);

		[Export("sceneWillResignActive:")]
		public virtual void OnResignActivation(UIScene scene);

		[Export("sceneDidEnterBackground:")]
		public virtual void DidEnterBackground(UIScene scene) ;

		[Export("scene:openURLContexts:")]
		public virtual bool OpenUrl(UIScene scene, NSSet<UIOpenUrlContext> urlContexts);

		[Export("scene:continueUserActivity:")]
		public virtual bool ContinueUserActivity(UIScene scene, NSUserActivity userActivity);

		[Export("scene:willContinueUserActivityWithType:")]
		public void WillContinueUserActivity(UIScene scene, string userActivityType);

		[Export("scene:didFailToContinueUserActivityWithType:error:")]
		public void DidFailToContinueUserActivity(UIScene scene, string userActivityType, NSError error);


		[Export("scene:didUpdateUserActivity:")]
		public void DidUpdateUserActivity(UIScene scene, NSUserActivity userActivity);

		[Export("scene:restoreInteractionStateWithUserActivity:")]
		public void RestoreInteractionState(UIScene scene, NSUserActivity stateRestorationActivity);