anchor.diff:  
   class _AndroidCredentialListNotifier extends OathCredentialListNotifier {
     final WithContext _withContext;
  -  final DeviceNode? _currentDevice;
  +  final bool _isUsbAttached;
     Timer? _timer;
   
     _AndroidCredentialListNotifier(
  -      this._withContext, this._currentDevice, List<OathPair>? value)
  +      this._withContext, this._isUsbAttached, List<OathPair>? value)
         : super() {
       state = value;
       _scheduleRefresh();
     }
   
     void _notifyWindowState(WindowState windowState) {
  -    if (_currentDevice == null) return;
  +    if (!_isUsbAttached) return;
       if (windowState.active) {
         _scheduleRefresh();
       } else {
  
positive.code:   }
  
    _scheduleRefresh() {
      _timer?.cancel();
      if (_currentDevice == null) return;
      if (state == null) {
        _log.debug('No OATH state, refresh immediately');
        refresh();
  
negative.code:   }
  
    refresh() async {
      if (!_isUsbAttached) return;
      _log.debug('refreshing credentials...');
  
      try {
  