DrmSession.State (ExoPlayer library)

```
@Documented
@Retention(SOURCE)
@Target({FIELD,METHOD,PARAMETER,LOCAL_VARIABLE,TYPE_USE})
public static @interface DrmSession.State
```
The state of the DRM session. One of DrmSession.STATE_RELEASED, DrmSession.STATE_ERROR, DrmSession.STATE_OPENING, DrmSession.STATE_OPENED or DrmSession.STATE_OPENED_WITH_KEYS.