[attenuator] Fix kwargs parsing am: 0a44c4fe38 am: 1a939696e1 am: 833a7681ab

Original change: https://android-review.googlesource.com/c/platform/tools/test/connectivity/+/2012055

Change-Id: Ic856b83d5edc0e7856512074e006122f9c4f38df
tree: 8a2ad54242aa7d55b15fad6d5efb0d33b62ef568
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. LICENSE
  7. OWNERS
  8. PREUPLOAD.cfg