Updated skipped tests for flutter_test directory. (#87880)

packages/flutter_test/test/widget_tester_test.dart

@@ -40,7 +40,7 @@ void main() {
 
     testWidgets('respects the skip flag', (WidgetTester tester) async {
       final Completer<void> completer = Completer<void>();
-      final Future<void> future = expectLater(null, FakeMatcher(completer), skip: 'testing skip');
+      final Future<void> future = expectLater(null, FakeMatcher(completer), skip: 'testing skip'); // [intended] API testing
       bool completed = false;
       future.then<void>((_) {
         completed = true;
@@ -55,7 +55,7 @@ void main() {
     testWidgets('should be skipped', (WidgetTester tester) async {
       expect(false, true);
     });
-  }, skip: true);
+  }, skip: true); // [intended] API testing
 
   group('findsOneWidget', () {
     testWidgets('finds exactly one widget', (WidgetTester tester) async {