* Add unit tests * Use TimestampUnwrapper * Follow style guide Change-Id: I057b05faba0aeafb2830a45007474be0eca1c6e0 Bug: webrtc:13756 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/256261 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Evan Shrubsole <eshr@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36313}