Expose some hidden APIs in DevicePolicyManager as SystemAPIs

Exposed setUserProvisioningState and checkProvisioningPreCondition as
SystemAPIs

Bug: 208634589
Bug: 188410712
Test: atest android.devicepolicy.cts.DevicePolicyManagerTest
Change-Id: I0b186a36793a1fca6066905892131f06454acc71
4 files changed