Merge changes from topic "av_rtp_measure"

* changes:
  VT: Change kStaticBuffer to 100ms except for ViLTE
  VT: Adjust an anchor time if packet comes too early.
  VT: provide last cvo value if it's not present.
  VT: Push incomplete packets unconditionally into decoder
  VT: process packets right after jbtime expired
  VT: Send more RTP SR information to upper layer
  VT: Corrects RTP/NTP timestamps of RTCP:SR(Sender Report).