
Split out `RelativeArrivalDelayTracker` and `DelayOptimizer` logic. This is in preparation for adding another `DelayOptimizer` specialized in handling reordered packets. Bug: webrtc:10178 Change-Id: Id3c1746d91980b171fa524f9b2b71cf11fc75f64 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231224 Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Cr-Commit-Position: refs/heads/main@{#34938}