TF-3683 Add integration test for case update draft email with message success toast

Signed-off-by: dab246 <tdvu@linagora.com>

integration_test/tests/compose/update_draft_email_with_messsage_success_toast_test.dart

@@ -0,0 +1,9 @@
+import '../../base/test_base.dart';
+import '../../scenarios/composer/update_draft_email_with_message_success_toast_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should see message success toast when edit draft email and save draft successfully',
+    scenarioBuilder: ($) => UpdateDraftEmailWithMessageSuccessToastScenario($),
+  );
+}