Merge "[DO NOT MERGE] Updating Security String to 2017-09-01 Bug:63846344" into lmp-dev am: 788d85f5ae  -s ours am: c0d2cfb8b8 am: 214aeaefef  -s ours am: 451a9d73bf am: d3789031c9 am: 35f0f8df33 am: f01d7163e8  -s ours am: aec34cff65 am: 8f46ad2ded am: 29c817a61c am: dbecffb85f
am: c7040501a1  -s ours

Change-Id: Id2d6b7359c54f2a990e4fb8bb4041f1637423092