Merge tag 'android-7.1.2_r8' into n-mr2

Android 7.1.2 release 8

# gpg: Signature made Mon 01 May 2017 05:38:56 PM CEST using DSA key ID 9AB10E78
# gpg: Can't check signature: public key not found
tree: e2f65387371a114967758b170d5927c5b51e6d6e
  1. include/
  2. libril/
  3. librilutils/
  4. reference-ril/
  5. rild/
  6. Android.mk
  7. CleanSpec.mk