feat!: Stop using Android native popups by default

BREAKING CHANGE: Native popups on Android were frequently causing problems with more complex controls like AutoSuggestBox and MenuBar. To aleviate these problems we are switching to use the unified managed popups everywhere instead. This may be breaking apps which depend on the native popups logic or layout.

src/Uno.UI/FeatureConfiguration.cs

@@ -295,7 +295,7 @@ public static class Popup
 			/// <summary>
 			/// Use a native popup to display the popup content. Otherwise use the <see cref="PopupRoot"/>.
 			/// </summary>
-			public static bool UseNativePopup { get; set; } = true;
+			public static bool UseNativePopup { get; set; } = false;
 #endif
 
 			/// <summary>