Rename fuzzer to match name of the object under test
Test is through more modern api
Rewrite fuzzing to better match real input traffic
Bug: webrtc:14859
Change-Id: I217658b64dd2211b06540155f201a9af3d04dedb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/297400
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39606}
