Update security string to 2015-12-01 - DO NOT MERGE
Update security string to 2015-12-01 - DO NOT MERGE

Change-Id: I155ec6c2b57c899f20bb85f5a5cf031499ba81b0

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build