Add device owner transfer functionality.

Test: cts-tradefed run cts-dev --module DevicePolicyManager --test com.android.cts.devicepolicy.MixedDeviceOwnerTransferTest
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest
Bug: 69542799
Change-Id: I2119aebc1554c804c8dd41383fd10e8354e77620
2 files changed