Use instead of checking the packet's payload type and ssrc. Bug: webrtc:7135 Change-Id: I272922a7879ef3e5e1344ce49044688572b9d942 Reviewed-on: https://webrtc-review.googlesource.com/c/120048 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26425}