Merge tag android-5.1.0_r1 into AOSP_5.1_MERGE

Change-Id: I1a0a89233184513d373e1d348d4221e39831cae6
tree: f1eadbb1b245fc30eb8698be8667363ec16282a9
  1. halimpl/
  2. src/
  3. Android.mk
  4. CleanSpec.mk