Hint text semantics to be excluded in a11y read out if textfield in not empty...

Hint text semantics to be excluded in a11y read out if textfield in not empty and label text is provided  (#115010)

* update hint semantics

* Update input_date_picker_form_field_test.dart

packages/flutter/lib/src/material/input_decorator.dart

@@ -2136,7 +2136,7 @@ class _InputDecoratorState extends State<InputDecorator> with TickerProviderStat
       opacity: (isEmpty && !_hasInlineLabel) ? 1.0 : 0.0,
       duration: _kTransitionDuration,
       curve: _kTransitionCurve,
-      alwaysIncludeSemantics: true,
+      alwaysIncludeSemantics: isEmpty || (decoration.labelText == null && decoration.label == null),
       child: Text(
         hintText,
         style: hintStyle,

packages/flutter/test/material/input_date_picker_form_field_test.dart

@@ -274,7 +274,7 @@ void main() {
       await tester.pumpAndSettle();
 
       expect(tester.getSemantics(find.byType(EditableText)), matchesSemantics(
-        label: 'Enter Date\nmm/dd/yyyy',
+        label: 'Enter Date',
         isTextField: true,
         isFocused: true,
         value: '01/15/2016',

packages/flutter/test/material/text_field_test.dart

@@ -6586,7 +6586,39 @@ void main() {
     expect(tester.getBottomLeft(find.byKey(keyB)).dy, rowBottomY);
   });
 
-  testWidgets('TextField semantics include label when unfocused and label/hint when focused', (WidgetTester tester) async {
+  testWidgets('TextField semantics include label when unfocused and label/hint when focused if input is empty', (WidgetTester tester) async {
+    final SemanticsTester semantics = SemanticsTester(tester);
+    final TextEditingController controller = TextEditingController(text: '');
+    final Key key = UniqueKey();
+
+    await tester.pumpWidget(
+      overlay(
+        child: TextField(
+          key: key,
+          controller: controller,
+          decoration: const InputDecoration(
+            hintText: 'hint',
+            labelText: 'label',
+          ),
+        ),
+      ),
+    );
+
+    final SemanticsNode node = tester.getSemantics(find.byKey(key));
+
+    expect(node.label, 'label');
+    expect(node.value, '');
+
+    // Focus text field.
+    await tester.tap(find.byKey(key));
+    await tester.pump();
+
+    expect(node.label, 'label\nhint');
+    expect(node.value, '');
+    semantics.dispose();
+  });
+
+  testWidgets('TextField semantics alway include label and not hint when input value is not empty', (WidgetTester tester) async {
     final SemanticsTester semantics = SemanticsTester(tester);
     final TextEditingController controller = TextEditingController(text: 'value');
     final Key key = UniqueKey();
@@ -6613,7 +6645,7 @@ void main() {
     await tester.tap(find.byKey(key));
     await tester.pump();
 
-    expect(node.label, 'label\nhint');
+    expect(node.label, 'label');
     expect(node.value, 'value');
     semantics.dispose();
   });