Extract and save some simple annotations for the clean speech input.
The annotations are estimated level, VAD (assuming clean speech) and speech level.
TBR=
Bug: webrtc:7494
Change-Id: Id73358e228fac721a77fc8a61a3474a5d52bdc84
Reviewed-on: https://webrtc-review.googlesource.com/12321
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20327}