sound: usb: Add snapshot for usb audio qmi driver

This change adds snapshot of usb audio qmi service related files.
A remote entity communicates with usb audio qmi server to enable
or disable particular audio stream on enumerated usb audio device.
This offloads ISOC data transfer operations to remote entity and
allows apps processor to go to power collapse more frequently for
better power saving. This snapshot is taken as of msm-4.14
commit <1216527842f1d> ("Merge "ARM: dts: msm: Add compute
priority mode and cooling devices in sm8150"").

Change-Id: I0d3c1c129723e2327406a61ae7c756736df99872
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>