API changes for audio recording notifications

Make AudioRecordConfiguration final since it is parcelable.
In AudioRecordingCallback, pass the array of active recording
  configurations.
Add @IntDef for return values for
  AudioRecordConfiguration.getClientAudioSource()

Bug 27385560

Change-Id: I01193577f50e50496742d888b45f89a2c3b67904
7 files changed