Convert some usage of `RawKeyEvent`, et al to `KeyEvent` (#139329)

## Description

This converts some uses of `RawKeyEvent` to `KeyEvent` in preparation for deprecating `RawKeyEvent`.

## Related Issues
 - https://github.com/flutter/flutter/issues/136419

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

@@ -1079,8 +1079,9 @@ class _MaterialAppState extends State<MaterialApp> {
     Widget result = _buildWidgetApp(context);
     result = Focus(
       canRequestFocus: false,
-      onKey: (FocusNode node, RawKeyEvent event) {
-        if (event is! RawKeyDownEvent || event.logicalKey != LogicalKeyboardKey.escape) {
+      onKeyEvent: (FocusNode node, KeyEvent event) {
+        if ((event is! KeyDownEvent && event is! KeyRepeatEvent) ||
+             event.logicalKey != LogicalKeyboardKey.escape) {
           return KeyEventResult.ignored;
         }
         return Tooltip.dismissAllToolTips() ? KeyEventResult.handled : KeyEventResult.ignored;

packages/flutter/test/widgets/focus_traversal_test.dart

@@ -2809,8 +2809,9 @@ void main() {
 
       await tester.pumpWidget(MaterialApp(home: Container()));
 
-      RawKeyboard.instance.addListener((RawKeyEvent event) {
+      HardwareKeyboard.instance.addHandler((KeyEvent event) {
         events.add(event);
+        return true;
       });
 
       await tester.idle();
@@ -2829,7 +2830,7 @@ void main() {
     });
 
     testWidgetsWithLeakTracking('Focus traversal does not break when no focusable is available on a WidgetsApp', (WidgetTester tester) async {
-      final List<RawKeyEvent> events = <RawKeyEvent>[];
+      final List<KeyEvent> events = <KeyEvent>[];
 
       await tester.pumpWidget(
         WidgetsApp(
@@ -2843,8 +2844,9 @@ void main() {
         ),
       );
 
-      RawKeyboard.instance.addListener((RawKeyEvent event) {
+      HardwareKeyboard.instance.addHandler((KeyEvent event) {
         events.add(event);
+        return true;
       });
 
       await tester.idle();

packages/flutter/test/widgets/selectable_text_test.dart

@@ -1895,7 +1895,7 @@ void main() {
   testWidgetsWithLeakTracking('Changing positions of selectable text', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);
-    final List<RawKeyEvent> events = <RawKeyEvent>[];
+    final List<KeyEvent> events = <KeyEvent>[];
 
     final Key key1 = UniqueKey();
     final Key key2 = UniqueKey();
@@ -1904,9 +1904,9 @@ void main() {
       MaterialApp(
         home:
         Material(
-          child: RawKeyboardListener(
+          child: KeyboardListener(
             focusNode: focusNode,
-            onKey: events.add,
+            onKeyEvent: events.add,
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: <Widget>[
@@ -1947,9 +1947,9 @@ void main() {
       MaterialApp(
         home:
         Material(
-          child: RawKeyboardListener(
+          child: KeyboardListener(
             focusNode: focusNode,
-            onKey: events.add,
+            onKeyEvent: events.add,
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: <Widget>[
@@ -1986,7 +1986,7 @@ void main() {
   testWidgetsWithLeakTracking('Changing focus test', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
     addTearDown(focusNode.dispose);
-    final List<RawKeyEvent> events = <RawKeyEvent>[];
+    final List<KeyEvent> events = <KeyEvent>[];
 
     final Key key1 = UniqueKey();
     final Key key2 = UniqueKey();
@@ -1995,9 +1995,9 @@ void main() {
       MaterialApp(
         home:
         Material(
-          child: RawKeyboardListener(
+          child: KeyboardListener(
             focusNode: focusNode,
-            onKey: events.add,
+            onKeyEvent: events.add,
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.stretch,
               children: <Widget>[

packages/flutter/test/widgets/shortcuts_test.dart

@@ -175,7 +175,7 @@ void main() {
       expect(invoked, 0);
       invoked = 0;
 
-      expect(RawKeyboard.instance.keysPressed, isEmpty);
+      expect(HardwareKeyboard.instance.logicalKeysPressed, isEmpty);
     });
 
     test('LogicalKeySet.hashCode is stable', () {
@@ -352,7 +352,7 @@ void main() {
       expect(invoked, 1);
       invoked = 0;
 
-      expect(RawKeyboard.instance.keysPressed, isEmpty);
+      expect(HardwareKeyboard.instance.logicalKeysPressed, isEmpty);
     }, variant: KeySimulatorTransitModeVariant.all());
 
     testWidgetsWithLeakTracking('handles repeated events', (WidgetTester tester) async {
@@ -378,7 +378,7 @@ void main() {
       expect(invoked, 2);
       invoked = 0;
 
-      expect(RawKeyboard.instance.keysPressed, isEmpty);
+      expect(HardwareKeyboard.instance.logicalKeysPressed, isEmpty);
     }, variant: KeySimulatorTransitModeVariant.all());
 
     testWidgetsWithLeakTracking('rejects repeated events if requested', (WidgetTester tester) async {
@@ -405,7 +405,7 @@ void main() {
       expect(invoked, 1);
       invoked = 0;
 
-      expect(RawKeyboard.instance.keysPressed, isEmpty);
+      expect(HardwareKeyboard.instance.logicalKeysPressed, isEmpty);
     }, variant: KeySimulatorTransitModeVariant.all());
 
     testWidgetsWithLeakTracking('handles Shift-Ctrl-C', (WidgetTester tester) async {
@@ -455,7 +455,7 @@ void main() {
       expect(invoked, 0);
       invoked = 0;
 
-      expect(RawKeyboard.instance.keysPressed, isEmpty);
+      expect(HardwareKeyboard.instance.logicalKeysPressed, isEmpty);
     });
 
     testWidgetsWithLeakTracking('isActivatedBy works as expected', (WidgetTester tester) async {