[Android] fix hcpp tapping, again, and add test. (#163035)

I didn't actually fix it. lets add a test this time.

dev/integration_tests/android_engine_test/lib/hcpp/tap_color_change_main.dart

@@ -0,0 +1,73 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:convert';
+
+import 'package:android_driver_extensions/extension.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_driver/driver_extension.dart';
+
+import '../src/allow_list_devices.dart';
+
+void main() async {
+  ensureAndroidDevice();
+  enableFlutterDriverExtension(
+    handler: (String? command) async {
+      return json.encode(<String, Object?>{
+        'supported': await HybridAndroidViewController.checkIfSupported(),
+      });
+    },
+    commands: <CommandExtension>[nativeDriverCommands],
+  );
+
+  // Run on full screen.
+  await SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersive);
+  runApp(const MainApp());
+}
+
+final class MainApp extends StatelessWidget {
+  const MainApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const MaterialApp(
+      debugShowCheckedModeBanner: false,
+      home: _HybridCompositionAndroidPlatformView(viewType: 'changing_color_button_platform_view'),
+    );
+  }
+}
+
+final class _HybridCompositionAndroidPlatformView extends StatelessWidget {
+  const _HybridCompositionAndroidPlatformView({required this.viewType});
+
+  final String viewType;
+
+  @override
+  Widget build(BuildContext context) {
+    return PlatformViewLink(
+      viewType: viewType,
+      surfaceFactory: (BuildContext context, PlatformViewController controller) {
+        return AndroidViewSurface(
+          controller: controller as AndroidViewController,
+          gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
+          hitTestBehavior: PlatformViewHitTestBehavior.opaque,
+        );
+      },
+      onCreatePlatformView: (PlatformViewCreationParams params) {
+        return PlatformViewsService.initHybridAndroidView(
+            id: params.id,
+            viewType: viewType,
+            layoutDirection: TextDirection.ltr,
+            creationParamsCodec: const StandardMessageCodec(),
+          )
+          ..addOnPlatformViewCreatedListener(params.onPlatformViewCreated)
+          ..create();
+      },
+    );
+  }
+}

dev/integration_tests/android_engine_test/test_driver/hcpp/tap_color_change_main_test.dart

@@ -0,0 +1,66 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:convert';
+
+import 'package:android_driver_extensions/native_driver.dart';
+import 'package:android_driver_extensions/skia_gold.dart';
+import 'package:flutter_driver/flutter_driver.dart';
+import 'package:test/test.dart';
+
+import '../_luci_skia_gold_prelude.dart';
+
+/// For local debugging, a (local) golden-file is required as a baseline:
+///
+/// ```sh
+/// # Checkout HEAD, i.e. *before* changes you want to test.
+/// UPDATE_GOLDENS=1 flutter drive lib/platform_view_tap_color_change_main.dart
+///
+/// # Make your changes.
+///
+/// # Run the test against baseline.
+/// flutter drive lib/platform_view_tap_color_change_main.dart
+/// ```
+///
+/// For a convenient way to deflake a test, see `tool/deflake.dart`.
+void main() async {
+  const String goldenPrefix = 'hybrid_composition_pp_platform_view';
+
+  late final FlutterDriver flutterDriver;
+  late final NativeDriver nativeDriver;
+
+  setUpAll(() async {
+    if (isLuci) {
+      await enableSkiaGoldComparator(namePrefix: 'android_engine_test$goldenVariant');
+    }
+    flutterDriver = await FlutterDriver.connect();
+    nativeDriver = await AndroidNativeDriver.connect(flutterDriver);
+    await nativeDriver.configureForScreenshotTesting();
+  });
+
+  tearDownAll(() async {
+    await nativeDriver.close();
+    await flutterDriver.close();
+  });
+
+  test('verify that HCPP is supported and enabled', () async {
+    final Map<String, Object?> response =
+        json.decode(await flutterDriver.requestData('')) as Map<String, Object?>;
+
+    expect(response['supported'], true);
+  }, timeout: Timeout.none);
+
+  test('should screenshot a rectangle that becomes blue after a tap with hcpp', () async {
+    await expectLater(
+      nativeDriver.screenshot(),
+      matchesGoldenFile('$goldenPrefix.tap_color_change_initial.png'),
+    );
+
+    await nativeDriver.tap(const ByNativeAccessibilityLabel('Change color'));
+    await expectLater(
+      nativeDriver.screenshot(),
+      matchesGoldenFile('$goldenPrefix.tap_color_change_tapped.png'),
+    );
+  }, timeout: Timeout.none);
+}

packages/flutter/lib/src/services/platform_views.dart

@@ -1205,7 +1205,7 @@ class HybridAndroidViewController extends AndroidViewController {
 
   @override
   Future<void> sendMotionEvent(AndroidMotionEvent event) async {
-    await SystemChannels.platform_views.invokeMethod<dynamic>('touch', event._asList(viewId));
+    await SystemChannels.platform_views_2.invokeMethod<dynamic>('touch', event._asList(viewId));
   }
 }