TF-4367 Add E2E test for test case forward email is forwarded when change language on mobile

integration_test/mixin/screen_scenario_mixin.dart

@@ -0,0 +1,19 @@
+import 'package:core/presentation/resources/image_paths.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import '../robots/composer_robot.dart';
+import '../robots/email_robot.dart';
+
+mixin ScreenScenarioMixin {
+  Future<void> closeEmailDetailedView({required EmailRobot emailRobot}) async {
+    await emailRobot.onTapBackButton();
+  }
+
+  Future<void> closeComposer({
+    required ComposerRobot composerRobot,
+    required ImagePaths imagePaths,
+  }) async {
+    await composerRobot.tapCloseComposer(imagePaths);
+    await composerRobot.tapDiscardChanges();
+  }
+}