[autotest] audio_facade: set input/output in set_chrome_active_node_type

Expose two arguments in set_chrome_active_node_type because bluetooth
input/output node types are both 'BLUETOOTH'.

BUG=chromium:552256
TEST=not used yet.

Change-Id: I7892409fd14059cbcf0e4c082a053b23e3e9b765
Reviewed-on: https://chromium-review.googlesource.com/312819
Commit-Ready: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Kalin Stoyanov <kalin@chromium.org>
3 files changed