Fixed leak and removed no-shuffle tag on scaffold_test.dart (#88375)

packages/flutter/test/material/scaffold_test.dart

@@ -2,12 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=123"
-@Tags(<String>['no-shuffle'])
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart' show DragStartBehavior;
 import 'package:flutter/material.dart';
@@ -1930,6 +1924,7 @@ void main() {
           '   showBottomSheet() to close the old bottom sheet before creating a\n'
           '   Scaffold with a (non null) bottomSheet.\n',
         );
+        await tester.pumpAndSettle();
       },
     );