Refactor KeyguardUpdateMonitor internal references

Dependency cycles are resolved in parent commits, KeyguardUpdateMonitor
can now reference repository.

Test: None
Bug: b/303808405
Flag: b/305984787 - REFACTOR_GETCURRENTUSER (added in ag/25089323)
Change-Id: I35bcf3f4383b887d6c314dc6909d00790754f163
2 files changed