Android CTS 8.0 Release 1 (OPR1.170623.011)
Add <linux/userfaultfd.h> am: 7a8824915a am: 470f19b9a4 am: 2e365841ac
am: e9534abf9e

Change-Id: I1f281391ed8af876c4a576c5564d258cff0cfb8a