CRAS: test_client - Add option to specify stream type.

This makes it easy to create different type of streams to test audio use
cases.

BUG=chromium:643039
TEST=cras_test_client --playback_file /dev/urandom --stream_type 1

Change-Id: I379b87293ae5fbeca8534d271ab6f47c2e3149d6
Reviewed-on: https://chromium-review.googlesource.com/479495
Commit-Ready: Chinyue Chen <chinyue@chromium.org>
Tested-by: Chinyue Chen <chinyue@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
1 file changed