启动uiauto.dev后会导致Android端AccessibilityService.getSystemService报空指针异常

启动uiautodev后，在Android端运行AccessibilityService服务，会导致accessibilityService.getSystemService(Context.WINDOW_SERVICE)空指针异常，二者是否存在冲突？

```
uiautodev version: 0.8.0
INFO: Started server process [17085]
INFO: Waiting for application startup.
INFO: Application startup complete.
INFO: Uvicorn running on http://127.0.0.1:20242 (Press CTRL+C to quit)
INFO: 127.0.0.1:60104 - "GET /api/info HTTP/1.1" 200 OK
INFO: 127.0.0.1:60104 - "GET /api/android/list HTTP/1.1" 200 OK
INFO: 127.0.0.1:60104 - "GET /api/android/features HTTP/1.1" 200 OK
INFO: 127.0.0.1:60115 - "OPTIONS /api/android/ljaij75p5ls4u8in/screenshot/0?_t=1749607423580 HTTP/1.1" 200 OK
```

```
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.content.Context.getSystemService(java.lang.String)' on a null object reference
```

Reproduce the issue with uiautodev 0.8.0 running and an Android AccessibilityService calling getSystemService(Context.WINDOW_SERVICE), then repeat with uiautodev stopped to isolate the interaction. The payload names no repository file or test; done means identifying the cause of the null service context and confirming that the call no longer raises a NullPointerException.

Written by the indexing model from the issue text.