CRAS: cras_router - Audio routing using cras

Routes from user selected input to user selected
output to create closed loop testing environment.
Now functions as a command line program with options.
Seperate commit from cras_test_helper.
DSP will be on seperate commit after discussing
exactly where to put the change.
Select input/output now removed from router as it is
now done with python on the front end.

BUG=None
TEST=ran file to/from various outputs/inputs on samus

Change-Id: I21ec7c6cd62f9b711a58ae0fcd28fb4db86c0192
Reviewed-on: https://chromium-review.googlesource.com/358130
Commit-Ready: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Cheng-Yi Chiang <cychiang@chromium.org>
2 files changed