hal: add sample rate as a part of argument in gef callback

Add sample rate as a part of argument in gef callback, as client needs
this information to determine what's the exact sample rate COPP is
running and get calibration value accordingly.

If there's gef APIs call in callback, device lock will be probed twice.
Temproraily unlock device lock around GEF device change notification
to solve deadlock.

CRs-Fixed: 1094022
Change-Id: I47fdb1f88397e4340ba930113c64c140596bc62a