Add RECEIVE_EXPLICIT_USER_INTERACTION_AUDIO AppOp

 New AppOp to be used for near-field file-based audio transfer
  (ie. TV Remote Service) to allow audio recording
  regardless of sensor privacy state, because it is considered
 an intentional user interaction: hold-to-talk

 And new Global Settings and SensorPrivacyManager APIs for the
 opt-out toggle - as agreed with PWG.

Bug: 235618473
Test: manual

Change-Id: I95cdf8fa362b937609bdf834a82b05ec8375ac26