Android Oreo AOSP Changes

Changes from 8.1.0_r25 (OPM2.171019.029.A1) to 8.1.0_r31 (OPM4.171019.021.D1):

Warning Releases with no significant changes other than version bump in platform/build component are likely to only feature proprietary binary blob (e.g. firmwares) changes.

Newly Added Components (0):

None

Removed Components (1):

Updated Components (29):