Merge "[DO NOT MERGE] Updating Platform Security String to 2017-12-01 on mnc-dev. Bug: 67774760" into mnc-dev am: 948d98b31a am: c4a501ce0f am: 0ef4e8a5e1 am: 960319ef76  -s ours am: a417f92e6d am: c19579df66 am: 754caa431b am: e66876f72b
am: 9c3d0e9534  -s ours

Change-Id: I7ac7a060b53bae548a093cbcbb4f73bfeacc0f52