Revert "On device lockdown, always show the keyguard"

This reverts commit c851ef6d27bf7d3193c85170706a67fb6185981a.

Reason for revert: b/300463732 regression
Bug: 300463732
Bug: 218495634

Change-Id: I314e5615b798487d9a965eaa0937905b65aa85fc
Merged-In: I314e5615b798487d9a965eaa0937905b65aa85fc
2 files changed