hal: Fix incorrect fluence devices selection for VoIP calls

VoIP calls using audio path are selecting fluence devices
even though fluence is not enabled. This is happening
due to incorrect device selection logic in audio HAL.
Fix this by ensuring fluence device selection only when
the fluence is enabled.

CRs-Fixed: 841602
Change-Id: I65cd0ca4e30cc8d1db87d81b2d84122164ea548e
1 file changed