GitLab

Update sound settings string from muted to mute as per spec.

BUG=865548

Change-Id: Ib4a349627966995fc8abca36d10937d194f145ae
Reviewed-on: https://chromium-review.googlesource.com/1156990Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582000}