CustomAudioAnalyzer is an interface of a component into APM that reads AudioBuffer without changing it. The APM sub-module is optional. It operates in full band. As described in the comments, it is an experimental interface which may be changed in the nearest future. Change-Id: I21edf729d97947529256407b10fa4b5219bb2bf5 Bug: webrtc:9678 Reviewed-on: https://webrtc-review.googlesource.com/96560 Reviewed-by: Alessio Bazzica <alessiob@webrtc.org> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Commit-Queue: Valeriia Nemychnikova <valeriian@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24481}