provides an implementation of the rtx-time parameter from
https://tools.ietf.org/html/rfc4588#section-8
that determines the maximum time a receiver waits for a frame
before sending a PLI.
BUG=webrtc:12420
Change-Id: Iff20d92c806989cd4d56fe330d105b3dd127ed24
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/201400
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33627}