beckham: Give audiohal access to prox and spkr calibration data

* Speaker (and receiver) calibration files are located on persist
  partition. Grant audio permission to find and read these files.

* Moto's libspeakerbundle needs access to the proximity sensor,
  so allow it to find sensorservice so MotSpeakerHelperProximity
  can instantiate SensorManager.

Change-Id: I888a424fc1c42dea0f130adfc74e02e47927e2b8