Update DPM.setKeyguardDisabled to also dismiss the keyguard

Currently if the keyguard is shown, setKeyguardDisabled does not
dismiss it but disables it for the future. This change also dismisses
the keyguard in this situation.

Test: manual
Bug: 64383815
Change-Id: Idb89f363510a18c741d335d96d11c5492c0eaee3
2 files changed