android 11 cannot open camera i

业务需求要在前台service中使用Camera

在三星Android 11（One UI 3.0，到目前还未正式发布）上报 错：
an error occurred while connecting to camera 0: status(-8, ex_service_specific): '6: validateclientpermissionslocked ...cannot open camera from background

在Android测试机上报：
An error occurred while connecting to camera 0: Status(-8, EX_SERVICE_SPECIFIC): '6: connectHelper:1735: Camera "0" disabled by policy'

1. 且在两种设备上，即便APP target为29 也报错；
2. 三星的设备上即便应用在前台打开foregroudservice后APP再退到后台也也报错；
   测试机上还会继续跑；

查文档关于foreground service在Android 11上的限制，说是
If your app starts a foreground service while running in the background, the foreground service cannot access the microphone or camera. Additionally, the service cannot access location unless your app has background location access.

While-in-use restrictions

On Android 11 (API level 30) and higher, if your app starts a foreground service while running in the background, the service has the following access restrictions:

• Unless the user has granted the ACCESS_BACKGROUND_LOCATION permission to your app, the service cannot access location.
• The service cannot access the microphone or camera.

If, on the other hand, your app starts a foreground service while running in the foreground, the service has the following access allowances:

• If the user has granted the ACCESS_BACKGROUND_LOCATION permission to your app, the service can access location all the time. Otherwise, if the user has granted the ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION permission to your app, the service has while-in-use access to location.
• If the user has granted the CAMERA permission to your app, the service has while-in-use access to the camera.
• If the user has granted the RECORD_AUDIO permission to your app, the service has while-in-use access to the microphone.

当然， 我的 target Api是29，在三星的One UI 3.0上也是不行了