Analyze code snippets in integration_test docs (#132314)

dev/bots/analyze_snippet_code.dart

@@ -72,6 +72,7 @@ import 'package:watcher/watcher.dart';
 final String _flutterRoot = path.dirname(path.dirname(path.dirname(path.fromUri(Platform.script))));
 final String _packageFlutter = path.join(_flutterRoot, 'packages', 'flutter', 'lib');
 final String _packageFlutterTest = path.join(_flutterRoot, 'packages', 'flutter_test', 'lib');
+final String _packageIntegrationTest = path.join(_flutterRoot, 'packages', 'integration_test', 'lib');
 final String _defaultDartUiLocation = path.join(_flutterRoot, 'bin', 'cache', 'pkg', 'sky_engine', 'lib', 'ui');
 final String _flutter = path.join(_flutterRoot, 'bin', Platform.isWindows ? 'flutter.bat' : 'flutter');
 
@@ -151,6 +152,7 @@ Future<void> main(List<String> arguments) async {
     flutterPackages = <Directory>[
       Directory(_packageFlutter),
       Directory(_packageFlutterTest),
+      Directory(_packageIntegrationTest),
       // TODO(goderbauer): Add all other packages.
     ];
   }

packages/integration_test/lib/integration_test.dart

@@ -326,9 +326,9 @@ https://flutter.dev/docs/testing/integration-tests#testing-on-firebase-test-lab
   ///
   /// Future<void> main() {
   ///   return integrationDriver(
-  ///     responseDataCallback: (data) async {
+  ///     responseDataCallback: (Map<String, dynamic>? data) async {
   ///       if (data != null) {
-  ///         for (var entry in data.entries) {
+  ///         for (final MapEntry<String, dynamic> entry in data.entries) {
   ///           print('Writing ${entry.key} to the disk.');
   ///           await writeResponseData(
   ///             entry.value as Map<String, dynamic>,

packages/integration_test/lib/integration_test_driver_extended.dart

@@ -20,13 +20,14 @@ import 'common.dart';
 /// ```dart
 /// import 'dart:async';
 ///
+/// import 'package:flutter_driver/flutter_driver.dart';
 /// import 'package:integration_test/integration_test_driver_extended.dart';
 ///
 /// Future<void> main() async {
 ///   final FlutterDriver driver = await FlutterDriver.connect();
 ///   await integrationDriver(
 ///     driver: driver,
-///     onScreenshot: (String screenshotName, List<int> screenshotBytes) async {
+///     onScreenshot: (String name, List<int> image, [Map<String, Object?>? args]) async {
 ///       return true;
 ///     },
 ///   );