Revert "Ensure keyguard is considered unlocked on devices that disable it."

This reverts commit ef344a3d.

Reason for revert: Patch re-opens b/37221109 and makes devices
with restricted profile unusable after rebooting

Bug: 71551000
Test: Rebooted device with restricted profile present

Change-Id: Ibc5d2843bda7828123e5017a38bab6b6adf67e8b