Merge "RTSP: correctly discard stale access unit after seeking." into nyc-dev am: 505abca79e
am: 10e6cadd16

* commit '10e6cadd16c9f789025cb113f403c98242c5a03b':
  RTSP: correctly discard stale access unit after seeking.

Change-Id: I9f4c45f9be42c4c27cb0047f31508b26bbb2587b