Revert "Revert "Hide keyguard earlier when exiting lockscreen""

This reverts commit aa75cf24cab90d3bb552af697017e5261639bfe9.

Reason for revert: Reverted with incorrect justification
Bug: 285395021

Change-Id: I353ce81ede781d2b8611b1343ee0d964fbca6408
4 files changed