Force voice path when recording audio during call

Some devices have an issue with distorted/garbled audio tx if recording
audio on a different source while in a call.  This is reproduced easily
in call recording applications that open an input stream after a voice
call has been established.

BACON-289 OPO-536
Change-Id: Id10f26f674ee8b812ee53a62a9f025803a9ca002