brillo: Fix control files. Fix control files to work with the interactive testing framework. BUG=none TEST=test_droid.py suite:brillo-audio passes Change-Id: Ifc6e243f48bfb1a434385d4570ea916efb56a73a Reviewed-on: https://chromium-review.googlesource.com/325825 Commit-Ready: Ralph Nathan <[email protected]> Tested-by: Ralph Nathan <[email protected]> Reviewed-by: Christopher Wiley <[email protected]> Reviewed-by: Simran Basi <[email protected]>