Cover cupertino/form_section_test with leak tracing (#135158)

packages/flutter/lib/src/cupertino/text_form_field_row.dart

@@ -313,6 +313,7 @@ class _CupertinoTextFormFieldRowState extends FormFieldState<String> {
   @override
   void dispose() {
     _cupertinoTextFormFieldRow.controller?.removeListener(_handleControllerChanged);
+    _controller?.dispose();
     super.dispose();
   }
 

packages/flutter/test/cupertino/form_section_test.dart

@@ -5,9 +5,10 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 void main() {
-  testWidgets('Shows header', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Shows header', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -22,7 +23,7 @@ void main() {
     expect(find.text('Header'), findsOneWidget);
   });
 
-  testWidgets('Shows footer', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Shows footer', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -37,7 +38,7 @@ void main() {
     expect(find.text('Footer'), findsOneWidget);
   });
 
-  testWidgets('Shows long dividers in edge-to-edge section part 1', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Shows long dividers in edge-to-edge section part 1', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -54,7 +55,7 @@ void main() {
     expect(childrenColumn.children.length, 3);
   });
 
-  testWidgets('Shows long dividers in edge-to-edge section part 2', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Shows long dividers in edge-to-edge section part 2', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -75,7 +76,7 @@ void main() {
     expect(childrenColumn.children.length, 5);
   });
 
-  testWidgets('Does not show long dividers in insetGrouped section part 1', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Does not show long dividers in insetGrouped section part 1', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -93,7 +94,7 @@ void main() {
     expect(childrenColumn.children.length, 1);
   });
 
-  testWidgets('Does not show long dividers in insetGrouped section part 2', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Does not show long dividers in insetGrouped section part 2', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         restorationScopeId: 'App',
@@ -115,7 +116,7 @@ void main() {
     expect(childrenColumn.children.length, 3);
   });
 
-  testWidgets('Sets background color for section', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Sets background color for section', (WidgetTester tester) async {
     const Color backgroundColor = CupertinoColors.systemBlue;
 
     await tester.pumpWidget(
@@ -138,7 +139,7 @@ void main() {
     expect(boxDecoration.color, backgroundColor);
   });
 
-  testWidgets('Setting clipBehavior clips children section', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Setting clipBehavior clips children section', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(
@@ -153,7 +154,7 @@ void main() {
     expect(find.byType(ClipRRect), findsOneWidget);
   });
 
-  testWidgets('Not setting clipBehavior does not produce a RenderClipRRect object', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Not setting clipBehavior does not produce a RenderClipRRect object', (WidgetTester tester) async {
     await tester.pumpWidget(
       CupertinoApp(
         home: Center(