DO NOT MERGE - Merge pi-dev@5234907 into stage-aosp-master

Bug: 120848293
Change-Id: I4f2673b36c7d82120c71bd5997d684d2b2593d42
tree: f696a0dc2115747413b9be648bd67d9123b1d2d1
  1. libbt-vendor/
  2. Android.mk
  3. CleanSpec.mk