Handle USER_ALL DPM broadcast

By querying status for all users rather than the
literal USER_ALL id

Fixes: 310933922
Test: NotificationLockscreenUserManagerTest
Test: CtsVerifier > Device Owner Tests > Check Device Owner (no
SystemUI crash)

Change-Id: Ifc7fafcc682c487b88441c624ed4e4836a8f33f3
2 files changed