Add RTCP packet type counter (for getting statistics such as sent/received NACK and FIR).
Add counter to RTCP sender and RTCP receiver.
Add video api GetRtcpPacketTypes().

BUG=2638
R=mflodman@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8179004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5575 4adac7df-926f-26a2-2b94-8c16560cd09d
15 files changed