Android 8.1.0 Release 15 (OPM1.171019.021)
Merge cherrypicks of [3478311, 3478390, 3478133, 3478175, 3478391, 3478392, 3478393, 3478134, 3478135, 3478213, 3478214, 3478215, 3478233, 3478234, 3478235, 3478251, 3478252, 3478253, 3478254, 3478394, 3478395, 3478396, 3478397, 3478398, 3478399, 3478400, 3478401, 3478402, 3478403, 3478292, 3478293, 3478312, 3478136, 3477911] into oc-mr1-release

Change-Id: I49326c9c58e834f363547b3047b2b5d1ebd0703e