TF-3349 Add integration test for forward email

integration_test/robots/email_robot.dart

@@ -0,0 +1,12 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import '../base/core_robot.dart';
+
+class EmailRobot extends CoreRobot {
+  EmailRobot(super.$);
+
+  Future<void> onTapForwardEmail() async {
+    await $(#forward_email_button).tap();
+    await $.pump(const Duration(seconds: 2));
+  }
+}