Instead of having the greeter read the settings of the KSLD, KSLD passes
the required values to the greeter as command line arguments. This
ensures that the greeter doesn't show a lock UI while the KSLD is still
in grace time and vice versa.

Two command line options are added:
--graceTime <milliseconds>
--nolock

The option --graceTime starts the timer to show the lock ui on timeout.
The option --nolock is for the case that the KSLD never locks the
screen.

REVIEW: 118214