Notification Screen and tasq_adaptive_list enhancements

test/layout_smoke_test.dart

@@ -73,6 +73,9 @@ class FakeNotificationsController implements NotificationsController {
   @override
   Future<void> markReadForTask(String taskId) async {}
 
+  @override
+  Future<void> markAllRead() async {}
+
   @override
   Future<void> registerFcmToken(String token) async {}