Added support to more @DevicePolicyOperation operations.

Also removed wrong permission check on lockNow()- it was only
allowing non-admin apps with the LOCK_NOW permission when the
device doesn't support the feature.

Test: manual verification trying to switch user when car is moving
Bug: 172376923

Change-Id: Icd1bde3a6f27e08c00d8851d16c1a072f7441f32