Add aab as alias for appbundle (#143855)

- **Fix #143778 add aab as alias to appbundle**

Fixes #143778

packages/flutter_tools/lib/src/commands/build_appbundle.dart

@@ -70,6 +70,9 @@ class BuildAppBundleCommand extends BuildSubCommand {
   @override
   final String name = 'appbundle';
 
+  @override
+  List<String> get aliases => const <String>['aab'];
+
   @override
   DeprecationBehavior get deprecationBehavior => boolArg('ignore-deprecation') ? DeprecationBehavior.ignore : DeprecationBehavior.exit;
 

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

@@ -64,6 +64,12 @@ void main() {
       Analytics: () => fakeAnalytics,
     });
 
+    testUsingContext('alias aab', () async {
+      final BuildAppBundleCommand command =
+          BuildAppBundleCommand(logger: BufferLogger.test());
+      expect(command.aliases, contains('aab'));
+    });
+
     testUsingContext('build type', () async {
       final String projectPath = await createProject(tempDir,
           arguments: <String>['--no-pub', '--template=app']);