Note: Does not include code for the actual late allocation of PTs. Bug: webrtc:360058654 Change-Id: Iaa6bd2db2f974aad84fe1ae9c1aca5aea5d1d25e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/362320 Reviewed-by: Florent Castelli <orphis@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43014}