This is a followup to https://webrtc-review.googlesource.com/61640,
moving the responsibility for setting these values to the
PayloadRouter.
Bug: webrtc:8830
Change-Id: I8e5a02cf7bb7417166f04d5511aab7a778799bc1
Reviewed-on: https://webrtc-review.googlesource.com/83164
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23654}