ZGB: Disable auto-mute and add AutoUnplugInputNode flag

Chrome will select the output device now. Also turn on
AutoUnplugInputNode flag to display only the active input
device on UI.

BUG=chromium:267355
TEST=gmerge adhd; select output device in Chrome UI.

Change-Id: Ic60070a44bd50ce1cc01b2f5622b9b397964f21d
Reviewed-on: https://gerrit.chromium.org/gerrit/65571
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
Tested-by: Hsinyu Chao <hychao@chromium.org>
Commit-Queue: Hsinyu Chao <hychao@chromium.org>
1 file changed