webrtc-pc

d256b769 - RTCRtpEncodingParameters attribute to turn on/off sending CN / DTX

RTCRtpEncodingParameters attribute to turn on/off sending CN / DTX Fix for Issue https://github.com/w3c/webrtc-pc/issues/644 Rebase of https://github.com/w3c/webrtc-pc/pull/675