audio: Fix BT sample rate handling properly

This should now support both old and new headsets,
as we rely on codec negotiation in the bluetooth
stack for narrow/wide band switching.

Change-Id: Ie9d308dfc55726fd1591a7d158f610bd267340e6
(cherry picked from commit d462f7b86e957f858959ef5d80fd1744689ee6ea)
2 files changed