RenderAnnotatedRegion should dispose created layers. (#136086)

packages/flutter/lib/src/rendering/proxy_box.dart

@@ -4989,6 +4989,7 @@ class RenderAnnotatedRegion<T extends Object> extends RenderProxyBox {
     RenderBox? child,
   }) : _value = value,
        _sized = sized,
+       _layerHandle = LayerHandle<AnnotatedRegionLayer<T>>(),
        super(child);
 
   /// A value which can be retrieved using [Layer.find].
@@ -5013,6 +5014,8 @@ class RenderAnnotatedRegion<T extends Object> extends RenderProxyBox {
     markNeedsPaint();
   }
 
+  final LayerHandle<AnnotatedRegionLayer<T>> _layerHandle;
+
   @override
   final bool alwaysNeedsCompositing = true;
 
@@ -5024,6 +5027,13 @@ class RenderAnnotatedRegion<T extends Object> extends RenderProxyBox {
       size: sized ? size : null,
       offset: sized ? offset : null,
     );
+    _layerHandle.layer = layer;
     context.pushLayer(layer, super.paint, offset);
   }
+
+  @override
+  void dispose() {
+    _layerHandle.layer = null;
+    super.dispose();
+  }
 }

packages/flutter/test/material/date_picker_theme_test.dart

@@ -552,12 +552,7 @@ void main() {
     await gesture.moveTo(tester.getCenter(find.text('18')));
     await tester.pumpAndSettle();
     expect(inkFeatures, paints..circle(color: datePickerTheme.rangeSelectionOverlayColor?.resolve(<MaterialState>{})));
-  },
-  leakTrackingTestConfig: const LeakTrackingTestConfig(
-    // TODO(ksokolovskyi): remove after fixing
-    // https://github.com/flutter/flutter/issues/136036
-    notDisposedAllowList: <String, int?> {'AnnotatedRegionLayer<SystemUiOverlayStyle>': 2},
-  ));
+  });
 
   testWidgetsWithLeakTracking('Dividers use DatePickerThemeData.dividerColor', (WidgetTester tester) async {
     Future<void> showPicker(WidgetTester tester, Size size) async {
@@ -902,10 +897,5 @@ void main() {
           ..circle(color: rangeSelectionOverlayColor.resolve(<MaterialState>{MaterialState.pressed})),
       );
     }
-  },
-  leakTrackingTestConfig: const LeakTrackingTestConfig(
-    // TODO(ksokolovskyi): remove after fixing
-    // https://github.com/flutter/flutter/issues/136036
-    notDisposedAllowList: <String, int?> {'AnnotatedRegionLayer<SystemUiOverlayStyle>': 2},
-  ));
+  });
 }