Fixed todo by replacing SequenceNumberUnwrapper with updated class
SeqNumUnwrapper that correctly handles reordering of early packets.
Bug: webrtc:10263
Change-Id: Iffd93db924fee132d35752996b8d29acbb315d24
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130498
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Johannes Kron <kron@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27417}