[flutter_tools] Replace android v2 embedding broken doc link (#107456)

Author: royarg02

packages/flutter_tools/lib/src/flutter_plugins.dart

@@ -436,7 +436,7 @@ Future<void> _writeAndroidPluginRegistrant(FlutterProject project, List<Plugin>
         if (!supportsEmbeddingV1 && supportsEmbeddingV2) {
           throwToolExit(
             'The plugin `${plugin['name']}` requires your app to be migrated to '
-            'the Android embedding v2. Follow the steps on https://flutter.dev/go/android-project-migration '
+            'the Android embedding v2. Follow the steps on the migration doc above '
             'and re-run this command.'
           );
         }

packages/flutter_tools/lib/src/project.dart

@@ -602,7 +602,7 @@ Your Flutter application is created using an older version of the Android
 embedding. It is being deprecated in favor of Android embedding v2. Follow the
 steps at
 
-https://flutter.dev/go/android-project-migration
+https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects
 
 to migrate your project. You may also pass the --ignore-deprecation flag to
 ignore this check and continue with the deprecated v1 embedding. However,

packages/flutter_tools/test/commands.shard/permeable/create_test.dart

@@ -786,7 +786,7 @@ void main() {
     // Import for the new embedding class.
     expect(mainActivity.contains('import io.flutter.embedding.android.FlutterActivity'), true);
 
-    expect(logger.statusText, isNot(contains('https://flutter.dev/go/android-project-migration')));
+    expect(logger.statusText, isNot(contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects')));
   }, overrides: <Type, Generator>{
     Logger: () => logger,
   });

packages/flutter_tools/test/general.shard/plugins_test.dart

@@ -762,7 +762,7 @@ dependencies:
           },
           throwsToolExit(
             message: 'The plugin `plugin1` requires your app to be migrated to the Android embedding v2. '
-                     'Follow the steps on https://flutter.dev/go/android-project-migration and re-run this command.'
+                     'Follow the steps on the migration doc above and re-run this command.'
           ),
         );
       }, overrides: <Type, Generator>{

packages/flutter_tools/test/general.shard/project_test.dart

@@ -195,7 +195,7 @@ void main() {
         // android:name="flutterEmbedding" android:value="2" />.
 
         project.checkForDeprecation(deprecationBehavior: DeprecationBehavior.ignore);
-        expect(testLogger.statusText, contains('https://flutter.dev/go/android-project-migration'));
+        expect(testLogger.statusText, contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects'));
       });
       _testInMemory('Android project not on v2 embedding exits', () async {
         final FlutterProject project = await someProject();
@@ -207,7 +207,7 @@ void main() {
           Future<dynamic>.sync(() => project.checkForDeprecation(deprecationBehavior: DeprecationBehavior.exit)),
           contains('Build failed due to use of deprecated Android v1 embedding.')
         );
-        expect(testLogger.statusText, contains('https://flutter.dev/go/android-project-migration'));
+        expect(testLogger.statusText, contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects'));
         expect(testLogger.statusText, contains('No `<meta-data android:name="flutterEmbedding" android:value="2"/>` in '));
       });
       _testInMemory('Project not on v2 embedding does not warn if deprecation status is irrelevant', () async {
@@ -226,21 +226,21 @@ void main() {
         // android:name="flutterEmbedding" android:value="2" />.
 
         project.checkForDeprecation(deprecationBehavior: DeprecationBehavior.ignore);
-        expect(testLogger.statusText, contains('https://flutter.dev/go/android-project-migration'));
+        expect(testLogger.statusText, contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects'));
       });
       _testInMemory('Android plugin project does not throw v1 embedding deprecation warning', () async {
         final FlutterProject project = await aPluginProject();
 
         project.checkForDeprecation(deprecationBehavior: DeprecationBehavior.exit);
-        expect(testLogger.statusText, isNot(contains('https://flutter.dev/go/android-project-migration')));
+        expect(testLogger.statusText, isNot(contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects')));
         expect(testLogger.statusText, isNot(contains('No `<meta-data android:name="flutterEmbedding" android:value="2"/>` in ')));
       });
       _testInMemory('Android plugin without example app does not show a warning', () async {
         final FlutterProject project = await aPluginProject();
         project.example.directory.deleteSync();
 
         await project.regeneratePlatformSpecificTooling();
-        expect(testLogger.statusText, isNot(contains('https://flutter.dev/go/android-project-migration')));
+        expect(testLogger.statusText, isNot(contains('https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects')));
       });
       _testInMemory('updates local properties for Android', () async {
         final FlutterProject project = await someProject();