Current way with updates on each frame caused a bogus jitter estimate
and lots of dropped frames in unfiltered KSVC stream.
Bug: chromium:912122
Change-Id: I4a1af71a242af3f9b5f5a411b194331b2df24f68
Reviewed-on: https://webrtc-review.googlesource.com/c/117566
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26322}