DO NOT MERGE Revert line from master-cp that should be different in qpr1

In master, we retrieve the KeyguardUpdateMonitor through Dependency.get().
This change has not landed in qpr1 and should use a different method of
access.

Bug: 140270231
Test: atest SystemUITests
Change-Id: Icbba30e52d4d011fc01cba13262b18a3a235316c
1 file changed