Fix build, Fix snackbar action button color on android, fix ios action button font (#1673)

* Fix snackbar action button color on android, fix ios action button font title

* fix nullable error

Co-authored-by: Gerald Versluis <[email protected]>

Author: VladislavAntonyuk

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/Snackbar/SnackBar.android.cs

@@ -98,7 +98,7 @@ internal async ValueTask Show(VisualElement sender, SnackBarOptions arguments)
 				}
 
 				var snackActionButtonView = snackBarView.FindViewById<TextView>(Resource.Id.snackbar_action) ?? throw new NullReferenceException();
-				if (arguments.BackgroundColor != Forms.Color.Default)
+				if (action.BackgroundColor != Forms.Color.Default)
 				{
 					snackActionButtonView.SetBackgroundColor(action.BackgroundColor.ToAndroid());
 				}

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/Snackbar/SnackBar.ios.macos.cs

@@ -102,7 +102,7 @@ internal ValueTask Show(VisualElement sender, SnackBarOptions arguments)
 
 				if (action.Font != Font.Default)
 				{
-					actionButton.Font = action.Font.ToUIFont();
+					actionButton.TitleLabel.Font = action.Font.ToUIFont();
 				}
 
 				if (action.ForegroundColor != Color.Default)