Only suppressing FUL on boot if selected fixes b/7338965

FUL is suppressed when first booted and unsuppressed when the user
leaves keyguard (by logging in or turning the screen off).  However,
if the user managed to enter the phone without going through
keyguard (security set to none, or initial device setup), FUL was
not being unsuppressed and it would not show up the first time the
user tried to use it.

This fix only suppresses FUL on first boot if it is the selected
security method.  Therefore, it is not suppressed the first time it
is used after setting it up.

Change-Id: I766bbce31ce3939de97661623fe3b8d3fa29c20d