temporary solution for Android AccessibilityService can't not control RustDesk itself

lib/pages/settings_page.dart

@@ -20,6 +20,9 @@ class SettingsPage extends StatefulWidget implements PageShape {
   @override
   final appBarActions = [];
 
+  @override
+  final scrollController = null;
+
   @override
   _SettingsState createState() => _SettingsState();
 }