Merge changes from topic "SLSI_VT"

* changes:
  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.
  VT: Retain RTP sequence number between SFR stop and start
  VT: Skip unknown payload type packet
  VT: Update payload value at runtime for SFR
  VT: Add FIR, PLI reaction
  VT: Add auto downgrade function
  VT: Add TMMBR feature for RTP Rx side
  VT: Add TMMBN feature on RTP Tx side
  VT: SFP: H264: CVO implementation for Rx side
  VT: SFR: H264: CVO implementation for Tx side.
  VT: Change socket option to REUSEADDR
  VT: Add TMMBR function on Rx
  VT: Recorder gets payload type value from param
  VT: Player/Recoder gets its SSRC ID from param
  VT: Add RTCP feedback message(TSFB & PSFB) parser to RTP source
  VT: StagefrightRecorder: Added a function for TMMBR
  VT: AHEVCAssembler: Supports H265(HEVC) for Rx.
  VT: ARTPWriter: Supports H265(HEVC) for Tx.
  VT: ARTPWriter: Supports ipv6
  VT: ARTPSource: Jitter buffer implementation.
  VT: ARTPConnection: Supports ipv6
  VT: SFP: Implements interface for RTP parameters.
  VT: RTPSource: Added a component as an one of NuPlayer::Source
  VT: ARTPConnection: bind RTP/RTCP sockets to specific IP.
  VT: ASessionDescription: Added SDPStringFactory.
  VT: SFR: added parameters to handle RTP IP Addresses through setParameters().
  VT: ARTPWriter: Enhanced ARTPWriter as a RTP output