TF-2877 Create notification data source & repo

lib/main/permissions/notification_permission_service.dart

@@ -0,0 +1,28 @@
+import 'package:permission_handler/permission_handler.dart';
+import 'package:tmail_ui_user/features/base/isolate/background_isolate_binary_messenger/background_isolate_binary_messenger_mobile.dart';
+import 'package:tmail_ui_user/main/permissions/permission_service.dart';
+
+class NotificationPermissionService extends PermissionService {
+
+  Future<bool> checkGroupPermissionByGroupId(String groupId) async {
+    if (groupId.isEmpty) {
+      return false;
+    }
+
+    const methodChannel = MethodChannel('com.linagora.android.teammail.notification.group.permission');
+    const methodName = 'getNotificationGroupPermission';
+    final invokeResult = await methodChannel.invokeMethod<bool>(
+      methodName,
+      groupId);
+    return invokeResult ?? false;
+  }
+
+  Future<bool> checkNotificationPermissionEnabled(String groupId) async {
+    final permissionGranted = await isGranted(Permission.notification);
+    if (!permissionGranted) {
+      return false;
+    }
+
+    return await checkGroupPermissionByGroupId(groupId);
+  }
+}