BUG FIX: adding count check for navigation stack before getting last item, adding check for mainpage as current page as additional failover. (#2379)

* adding count check for navigation stack before getting last-1, and adding check for mainpage as last resort

* Removing obsolete code for Application.Current.MainPage

* Use `LastOrDefault()`

---------

Co-authored-by: unknown <[email protected]>
Co-authored-by: Brandon Minnick <[email protected]>
Co-authored-by: James Crutchley <[email protected]>
Co-authored-by: Brandon Minnick <[email protected]>

Author: 4 people

src/CommunityToolkit.Maui.MediaElement/Views/MauiMediaElement.macios.cs

@@ -170,7 +170,7 @@ static bool TryGetCurrentPage([NotNullWhen(true)] out Page? currentPage)
 		}
 
 		// If not using Shell or a Modal Page, return the visible page in the (non-modal) NavigationStack
-		if (window.Navigation.NavigationStack[^1] is Page page)
+		if (window.Navigation.NavigationStack.LastOrDefault() is Page page)
 		{
 			currentPage = page;
 			return true;