[leak-tracking] Cover testwidgets with leak tracking in test/gestures (#136166)

packages/flutter/test/gestures/transformed_monodrag_test.dart

@@ -11,7 +11,7 @@ import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 void main() {
   group('Horizontal', () {
-    testWidgets('gets local coordinates', (WidgetTester tester) async {
+    testWidgetsWithLeakTracking('gets local coordinates', (WidgetTester tester) async {
       int dragCancelCount = 0;
       final List<DragDownDetails> downDetails = <DragDownDetails>[];
       final List<DragEndDetails> endDetails = <DragEndDetails>[];

packages/flutter/test/gestures/transformed_scale_test.dart

@@ -4,9 +4,10 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 void main() {
-  testWidgets('gets local coordinates', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('gets local coordinates', (WidgetTester tester) async {
     final List<ScaleStartDetails> startDetails = <ScaleStartDetails>[];
     final List<ScaleUpdateDetails> updateDetails = <ScaleUpdateDetails>[];
 
@@ -30,7 +31,7 @@ void main() {
       ),
     );
 
-    await tester.startGesture(tester.getCenter(find.byKey(redContainer)) - const Offset(20, 20));
+    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.byKey(redContainer)) - const Offset(20, 20));
     final TestGesture pointer2 = await tester.startGesture(tester.getCenter(find.byKey(redContainer)) + const Offset(30, 30));
     await pointer2.moveTo(tester.getCenter(find.byKey(redContainer)) + const Offset(20, 20));
 
@@ -42,5 +43,11 @@ void main() {
     expect(startDetails.first.focalPoint, const Offset(380, 280));
     expect(startDetails.last.localFocalPoint, const Offset(50, 50));
     expect(startDetails.last.focalPoint, const Offset(400, 300));
+
+    await tester.pumpAndSettle();
+    await gesture.up();
+    await pointer2.up();
+    await tester.pumpAndSettle();
+
   });
 }