Bug-当设备USB拔掉，_usbmux.Usbmux().device_udid_list()还是会返回拔掉设备的udid

tidevice版本：0.3.5 @codeskyblue 堆栈如下：
File "F:\GitLab\apprunner\apprunner\device\ios\ios_device.py", line 200, in _install_agent
device = tidevice.Device(self.get_udid())
File "F:\GitLab\apprunner\venv\lib\site-packages\tidevice\_device.py", line 86, in __init__
self._info = self.info
File "F:\GitLab\apprunner\venv\lib\site-packages\cached_property.py", line 36, in __get__
value = obj.__dict__[self.func.__name__] = self.func(obj)
File "F:\GitLab\apprunner\venv\lib\site-packages\tidevice\_device.py", line 115, in info
raise MuxError("Device: {} not ready".format(self._udid))
tidevice.exceptions.MuxError: Device: 60d96bf4160b149ea798f198aeb790c50a5c5df6 not ready

Reproduce the USB detach scenario on tidevice 0.3.5 and inspect _usbmux.Usbmux().device_udid_list() alongside tidevice/_device.py, where the not-ready error is raised. Trace whether the detached UDID remains in the returned list; done means the list no longer includes it after removal and the reported MuxError path is avoided.

Written by the indexing model from the issue text.