am 0fcfc2a0: Merge "release AudioTrack after each play - Otherwise, resource leak happens in audioflinger which causes allocation failure when all tests are run. - may be the cause for 5939203" into ics-mr1

* commit '0fcfc2a0ba7b5660e81894b37d989aec5544ea05':
  release AudioTrack after each play - Otherwise, resource leak happens in audioflinger which causes allocation failure when all tests are run. - may be the cause for 5939203