Tracking keyframe packets is a useless optimization that kicked in when the nack list is full (1000 packets). Bug: none Change-Id: I134ecb4d51131718e5bb8775847fbde18f262ef9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/334645 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Philip Eliasson <philipel@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41547}