Android - call base dispatch key event before called toplevel's override (#16969)

* android - call base dispatch key event before called toplevel's override

* android - handle keyevent in avalonia before calling base DispatchKeyEvent

---------

Co-authored-by: Benedikt Stebner <Gillibald@users.noreply.github.com>

src/Android/Avalonia.Android/AvaloniaView.cs

@@ -66,7 +66,9 @@ namespace Avalonia.Android
 
         public override bool DispatchKeyEvent(KeyEvent? e)
         {
-            return _view.View.DispatchKeyEvent(e);
+            if (!_view.View.DispatchKeyEvent(e))
+                return base.DispatchKeyEvent(e);
+            return true;
         }
 
         [SupportedOSPlatform("android24.0")]

src/Android/Avalonia.Android/Platform/Specific/Helpers/AndroidKeyboardEventsHelper.cs

@@ -70,6 +70,8 @@ namespace Avalonia.Android.Platform.Specific.Helpers
 
             _view.Input?.Invoke(rawKeyEvent);
 
+            bool handled = rawKeyEvent.Handled;
+
             if ((e.Action == KeyEventActions.Down && e.UnicodeChar >= 32)
                 || unicodeTextInput != null)
             {
@@ -80,6 +82,8 @@ namespace Avalonia.Android.Platform.Specific.Helpers
                   unicodeTextInput ?? Convert.ToChar(e.UnicodeChar).ToString()
                   );
                 _view.Input?.Invoke(rawTextEvent);
+
+                handled = handled || rawTextEvent.Handled;
             }
 
             if (e.Action == KeyEventActions.Up)
@@ -90,7 +94,7 @@ namespace Avalonia.Android.Platform.Specific.Helpers
             }
 
             callBase = false;
-            return false;
+            return handled;
         }
 
         private static RawInputModifiers GetModifierKeys(KeyEvent e)