uac_hid: add uac hid volume report  [3/3]

PD#SWPL-166429

Problem:
The SDK does not have a unified method to report the device's
volume mute and play/stop state to the host.

Solution:
Add uac_hid command to report device volume state to host.

Verify:
A113X2 AV400 Board.

Change-Id: I64c38d73436567901db8e9b40975791db242e4be
Signed-off-by: shuai.liu <shuai.liu@amlogic.com>
2 files changed