When new packets are enqueued after a dead-period where media debt is zero, that time slice should not be used to reduce the debt for the new packet. Bug: webrtc:10809 Change-Id: Ifb960548e6aa349b79f37743cbfed78a5c937a13 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/234081 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Commit-Queue: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35143}