Refactor FrameCandenceAdapter to keep track of input frame rate.
Also a field trial WebRTC-FrameCadenceAdapter-UseVideoFrameTimestamp is added to control if VideoFrame timestamp should be used or local clock when calculating frame rate.
Uma is recorded to tell if input frame timestamp is monotonically increasing.
Bug: webrtc:10481, webrtc:15887
Change-Id: I6d698e9f9dcfe8c023d2d35371435c47f70102b0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/342760
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41967}
784af1f42e