TF-3685 Add integration test for case change identity in draft email

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

integration_test/tests/compose/change_identity_in_draft_email_test.dart

@@ -0,0 +1,9 @@
+import '../../base/test_base.dart';
+import '../../scenarios/composer/change_identity_in_draft_email_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should see new identity in From field when select new identity and save as draft successfully',
+    scenarioBuilder: ($) => ChangeIdentityInDraftEmailScenario($),
+  );
+}