Revert "Revert "Attempt to fix keyguard missing bug""

This reverts commit 1991590ddd0ca6d3a0cac290b65120c147034dbc
and fixes a bug where we were showing the scrim on devices without keyguard.

Bug: 18468369
Change-Id: Idce1370dadacd09c4a8f1a7fd9728c23b218d19c
2 files changed