Android 8.1.0 Release 50 (OPM7.181105.004)
Merge cherrypicks of [4997814, 4997815, 4997816, 4996950, 4996344, 4997836, 4997837, 4997838, 4998071, 4998091, 4998092, 4998093] into oc-m7-release

Change-Id: I2ee865c56a2cd199ab3e4fc92dc642de15fae3eb