audio: Add check to confirm if routing to BT SCO is successfull

-Routing to BT-SCO can fail if the BT SOC gets disconnected or
the remote disconnects
-In such scenarios if audio is in process of routing streams to
BT SCO then those routing requests fail, hence the complete
data chain gets stalled.
-Add a mechanism to confirm with BT Codec driver if the last
routing request was successfull, if not close the stream
to avoid hang.

Change-Id: Ic78ba90ad55f30d99cdd76a6c0a0dc5398706b03