The fuzzer will hammer on the UpdateSid and Generate methods of
ComfortNoiseDecoder.
The change also includes a fix to an issue in WebRtcSpl_FilterAR, which
was immediately found by running the fuzzer locally.
Bug: none
Change-Id: I5283427cb27844fb953e2caa35423ea873aca2ff
Reviewed-on: https://webrtc-review.googlesource.com/28100
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21134}
