Consider stream restart when two sequential packets arrived far from previous packets' sequence numbers. instead of resetting on single one. For packet loss calculation ignore sequence number gap during reset. Bug: webrtc:9445, b/38179459 Change-Id: I0c2717ef8f9ec182b280ae757b5582f56d9afcef Reviewed-on: https://webrtc-review.googlesource.com/c/111962 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25890}