Merge Android R

Bug: 168057903
Merged-In: I02ad49d6b2c3344b90108ee0933a82bd2244dfd8
Change-Id: I3280e5fc715ebf1fd16e52466236a56f8fb1197c
tree: 27d8378cdb568e851bc7790007133952fb31309a
  1. Android.bp
  2. CleanSpec.mk
  3. src/