TF-3552 Add integration test for display XSS content in email view

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

integration_test/tests/email_detailed/display_email_with_xss_content_test.dart

@@ -0,0 +1,9 @@
+import '../../base/test_base.dart';
+import '../../scenarios/email_detailed/display_email_with_xss_content_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should not display alert dialog when opening an email containing content xss',
+    scenarioBuilder: ($) => DisplayEmailWithXssContentScenario($),
+  );
+}