TF-3260 Add integration test for app grid

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

integration_test/robots/app_grid_robot.dart

@@ -0,0 +1,12 @@
+
+import 'package:flutter_test/flutter_test.dart';
+
+import '../base/core_robot.dart';
+
+class AppGridRobot extends CoreRobot {
+  AppGridRobot(super.$);
+
+  Future<void> openAppInAppGridByAppName(String appName) async {
+    await $(find.text(appName)).tap();
+  }
+}