Hide keyguard when SIM transitions to READY

The keyguard is not properly updated when the SIM PIN verification is
performed using different means than the UI. Additional states are used
before READY, so simWasLocked might be false.

Bug: 160784387
Test: manual
Change-Id: Ibca04e3d6a61c27d4b40f94a8a6223d9739b15ac