am 50246cd5: am 5b1f0c9f: Merge "RTP: reduce the latency by overlapping AudioRecord and AudioTrack." into gingerbread

Merge commit '50246cd5df8098a1541b0d90ef7dc8832cfe7e11'

* commit '50246cd5df8098a1541b0d90ef7dc8832cfe7e11':
  RTP: reduce the latency by overlapping AudioRecord and AudioTrack.