webrtc clocks use 10based fraction time to calculate intervals. Rtcp require 16based fraction time to report intervals. Bug: webrtc:8239 Change-Id: I25cab5ad7b7614c86c174813a195e7ba767ee43b Reviewed-on: https://webrtc-review.googlesource.com/21383 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20619}