audio: created audio use case configurations - DO NOT MERGE

First implementation of logic to select audio routes according to
use cases.
Created place holder audio routes in mixer_paths.xml for planned
use cases to facilitate tuning.

Temporary mixer paths for lunch box are needed because of different
mic wiring and will be removed later.

Change-Id: Ideb06174c2063a5631033424ff20342714b9c177
5 files changed