[flutter_local_notifications] Fix check ids

packages/flutter_local_notifications/flutter_local_notifications_aurora/lib/flutter_local_notifications_aurora.dart

@@ -51,7 +51,7 @@ class FlutterLocalNotificationsAurora
   @override
   Future<void> cancel(int id) async {
     final ids = auroraIDs[id] ?? [];
-    if (auroraIDs.isNotEmpty) {
+    if (ids.isNotEmpty) {
       final client = DBusClient.session();
       final object = OrgFreedesktopNotifications(
           client,