Merge changes from topic "200609_ViLTE_sync"

* changes:
  Miscellaneous fixups for VT contribution update.
  VT: ARTPWriter: Introduce Moderator logic
  VT: ARTPWriter: Add traffic recorder
  VT: Migration AAVCAssembler patches to AHEVCAssembler.
  VT: Enhancements on RTP depacketizer (2)
  VT: Refine codes in AAVCAssembler.
  VT: RTCP:NACK implementation. (RFC-4585)
  VT: Report all data about packet receiving up to application
  VT: Enhancements on RTP depacketizer
  VT: Enhancements on RTP packetizer.
  VT: Added an interface to set JitterBufferTime.
  VT: Some parameters not provided to encoder if source is surface.
  VT: H265: prepend VPS/SPS/PPS to I-frame.
  VT: Change to KMP algorithm for searching H.264 start prefix code
  VT: ARTPWriter: StripStartcode() & SpsPpsParser() bug fix
  revert ARTPWriter StripStartcode fix
  media: further miscellaneous fixes to VT contribution
  media: miscellaneous fixes to VT contribution
  VT: DSCP implementation.
  VT: SFR: Added missing rtp-param-opponent-id in stagefright.
  VT: SFP: bind socket to specific network
  VT: SFR: bind socket to specific network.
  VT: Remove assertion in send() function.
  VT: ARTPConnection: added an event to notify first-rtcp packet.
  VT: Print assembler queue status for the first frame
  VT: Enlarge jitter buffer range from 200ms to 300ms
  VT: Postpone bitrate down for considering camera switch
  VT: Rotation parameter should be applied only for video call.
  VT: Add OMX_Video_ControlRateConstant feature
  VT: OMX_ErrorStreamCorrupt should be skipped only for RTP scenario.