Document process capability in AppOps.md.

can fluctuate when switching apps. By delaying the change the appops service is not affected by

can fluctuate when switching apps. By delaying the change the appops service is not affected by

those.

those.

The proc state is used for two use cases: Firstly, Tracking remembers the proc state for each

In addition to proc state, the `AppOpsService` also receives process capability update from the

tracked event. Secondly, `noteOp`/`checkOp` calls for app-op that are set to `MODE_FOREGROUND` are

`ActivityManagerService`. Proc capability specifies what while-in-use(`MODE_FOREGROUND`) operations

translated using the `AppOpsService.UidState.evalMode` method into `MODE_ALLOWED` when the app is

 the proc is allowed to perform in its current proc state. There are three proc capabilities

counted as foreground and `MODE_IGNORED` when the app is counted as background. `checkOpRaw`

 defined so far: 

calls are not affected.

`PROCESS_CAPABILITY_FOREGROUND_LOCATION`, `PROCESS_CAPABILITY_FOREGROUND_CAMERA` and

`PROCESS_CAPABILITY_FOREGROUND_MICROPHONE`, they correspond to the while-in-use operation of

The current proc state for an app can be read from `dumpsys appops`. The tracking information can

location, camera and microphone (microphone is `RECORD_AUDIO`).

be read from `dumpsys appops`

In `ActivityManagerService`, `PROCESS_STATE_TOP` and `PROCESS_STATE_PERSISTENT` have all

three capabilities, `PROCESS_STATE_FOREGROUND_SERVICE` has capabilities defined by

 `foregroundServiceType` that is specified in foreground service's manifest file. A client process 

 can pass its capabilities to service using `BIND_INCLUDE_CAPABILITIES` flag.

The proc state and capability are used for two use cases: Firstly, Tracking remembers the proc state

 for each tracked event. Secondly, `noteOp`/`checkOp` calls for app-op that are set to

 `MODE_FOREGROUND` are translated using the `AppOpsService.UidState.evalMode` method into

 `MODE_ALLOWED` when the app has the capability and `MODE_IGNORED` when the app does not have the 

 capability. `checkOpRaw` calls are not affected.

The current proc state and capability for an app can be read from `dumpsys appops`.

The tracking information can be read from `dumpsys appops`

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