Push the device owner packageName from DPMS to ATMS

instead of calling DPM.isDeviceOwnerApp()

Due to lock ordering AM/ATM cannot call DPM directly.

Bug: 123950811
Test: atest WmTests:ActivityStarterTests
Test: atest FrameworksServicesTests:DevicePolicyManagerTest
Test: manual with TestDPC (set DO, reboot device, etc.)
Change-Id: I14c6f48fe07243fe324ea41e9403c37aaceea304