Exclude semantics is semanticslabel is present (flutter#90136)

Author: guidezpl

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

@@ -704,6 +704,7 @@ class _SelectableTextState extends State<SelectableText> with AutomaticKeepAlive
 
     return Semantics(
       label: widget.semanticsLabel,
+      excludeSemantics: widget.semanticsLabel != null,
       onLongPress: () {
         _effectiveFocusNode.requestFocus();
       },

packages/flutter/test/widgets/selectable_text_test.dart

@@ -2251,20 +2251,12 @@ void main() {
 
     expect(semantics, hasSemantics(TestSemantics.root(
       children: <TestSemantics>[
-        TestSemantics.rootChild(
+        TestSemantics(
           id: 1,
-          textDirection: TextDirection.ltr,
+          actions: <SemanticsAction>[SemanticsAction.longPress],
           label: 'German greeting for good day',
-          value: 'Guten Tag',
-          actions: <SemanticsAction>[
-            SemanticsAction.longPress,
-          ],
-          flags: <SemanticsFlag>[
-            SemanticsFlag.isTextField,
-            SemanticsFlag.isReadOnly,
-            SemanticsFlag.isMultiline,
-          ],
-        ),
+          textDirection: TextDirection.ltr,
+        )
       ],
     ), ignoreTransform: true, ignoreRect: true));
   });