Add passing optional speech level and speech probability to Process().
This enables computing an override for the RMS error from
Agc::GetRmsErrorDb(). Currently no speech level or probability are
passed outside the tests and no override happens elsewhere.
Bug: webrtc:7494
Change-Id: I0a7b1204aa51bcde8588963a5af023410405e83d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/277560
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Commit-Queue: Hanna Silen <silen@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38318}
a098fcdb3d