Remote set volume command

This CL introduces a remote command that enables device administrators to remotely set device volume on CrOS devices.

More context can be found by reading the design doc go/remote-audio-management

BUG=682792

Review-Url: https://codereview.chromium.org/2733903002
Cr-Original-Commit-Position: refs/heads/master@{#455469}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 0f397d38f3023f90d0765ac41416cb1fb4226609
1 file changed