Initialize userfaultfd availability even when not using it

This ensures that userfaultfd syscall is not invoked after the app has
setup seccomp filter, if any.

Bug: 266731037
Bug: 160737021
Test: manual
Change-Id: Ifc584e3f572ce3bd1fffc4698b932e252526074d
(cherry picked from commit 6c6e2df516583f0bd6983e8d3e72dcab26f49615)
Merged-In: Ifc584e3f572ce3bd1fffc4698b932e252526074d
1 file changed