Calculate number of freezes per minute for a received video stream
and report this metric to UMA.
Bug: webrtc:9803
Change-Id: I6d72a2daf58b2f734a576fff469c1fead6cc69b3
Reviewed-on: https://webrtc-review.googlesource.com/c/103180
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24944}