fix Ink not updating on TextField newline (#140700)

Fixes a layout bug when using an EditableText and something containing an Ink widget.

packages/flutter/lib/src/widgets/editable_text.dart

@@ -37,6 +37,7 @@ import 'scroll_position.dart';
 import 'scrollable.dart';
 import 'scrollable_helpers.dart';
 import 'shortcuts.dart';
+import 'size_changed_layout_notifier.dart';
 import 'spell_check.dart';
 import 'tap_region.dart';
 import 'text.dart';
@@ -4951,6 +4952,7 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
                             _openInputConnection();
                             _updateSelectionRects(force: true);
                           },
+                          child: SizeChangedLayoutNotifier(
                             child: _Editable(
                               key: _editableKey,
                               startHandleLayerLink: _startHandleLayerLink,
@@ -4996,6 +4998,7 @@ class EditableTextState extends State<EditableText> with AutomaticKeepAliveClien
                             ),
                           ),
                         ),
+                      ),
                     );
                   },
                 ),

packages/flutter/test/widgets/editable_text_test.dart

@@ -16731,6 +16731,34 @@ void main() {
     final EditableTextState state = tester.state<EditableTextState>(find.byType(EditableText));
     expect(state.renderEditable.cursorColor, cursorColor.withOpacity(opacity));
   });
+
+  testWidgets('should notify on size change', (WidgetTester tester) async {
+    int notifyCount = 0;
+    await tester.pumpWidget(MaterialApp(
+      home: Scaffold(
+        body: NotificationListener<SizeChangedLayoutNotification>(
+          onNotification: (SizeChangedLayoutNotification notification) {
+            notifyCount += 1;
+            return false;
+          },
+          child: EditableText(
+            backgroundCursorColor: Colors.grey,
+            cursorColor: Colors.grey,
+            controller: controller,
+            focusNode: focusNode,
+            maxLines: 3,
+            minLines: 1,
+            style: textStyle,
+          ),
+        ),
+      ),
+    ));
+
+    expect(notifyCount, equals(0));
+    await tester.enterText(find.byType(EditableText), '\n');
+    await tester.pumpAndSettle();
+    expect(notifyCount, equals(1));
+  });
 }
 
 class UnsettableController extends TextEditingController {