chore: Adjust check

Author: MartinZikmund

src/Uno.UI/UI/Xaml/Application.Android.cs

@@ -32,5 +32,13 @@ static partial void StartPartial(ApplicationInitializationCallback callback)
 	/// </remarks>
 	private DateTimeOffset GetSuspendingOffset() => DateTimeOffset.Now.AddSeconds(5);
 
-	partial void ApplySystemOverlaysTheming() => NativeWindowWrapper.Instance?.ApplySystemOverlaysTheming();
+	partial void ApplySystemOverlaysTheming()
+	{
+		// This is needed only due to the fact that currently Instance accessor creates the wrapper
+		// eagerly - which could then happen too early. Will no longer be needed when un-singletoned.
+		if (InitializationComplete)
+		{
+			NativeWindowWrapper.Instance.ApplySystemOverlaysTheming();
+		}
+	}
 }

src/Uno.UI/UI/Xaml/Application.cs

@@ -444,10 +444,7 @@ private void SetRequestedTheme(ApplicationTheme requestedTheme)
 
 		internal void OnRequestedThemeChanged()
 		{
-			if (InitializationComplete)
-			{
-				ApplySystemOverlaysTheming();
-			}
+			ApplySystemOverlaysTheming();
 			OnResourcesChanged(ResourceUpdateReason.ThemeResource);
 		}