Merge tag 'android-8.0.0_r30' into staging/lineage-15.0_merge-android-8.0.0_r30

Android 8.0.0 release 30

# gpg: Signature made Mon 06 Nov 2017 10:36:42 AM PST using DSA key ID 9AB10E78
# gpg: Can't check signature: public key not found

* tag 'android-8.0.0_r30':
  surfaceflinger: fix a nullptr dereference