shamu: Set default values for audio HAL.

The environmental variables used by audio HAL to select which voice call
audio devices are used in a given use case changed.

Set the default values for shamu properly.

Bug: 31113526
Change-Id: I1d1f5592e54f2e788546c93b89bed8f430ab496b
(cherry picked from commit 6fdd73459727fca39dda3fb9b428c854b59eadfc)
1 file changed