addTrack should result in an ontrack event firing on the remote side.
removeTrack should result in an ended event firing on the remote side. (What if there are multiple senders with the same track?)
Summary: RTP Media API: Fire RTCPeerConnection.ontrack and MediaStreamTrack.onmuted/MediaStream.onremovetrack (was: RTP Media API: Fire RTCPeerConnection.ontrack and MediaStreamTrack.ended events)
Comment 1 by hbos@chromium.org
, Jul 12 2017