Make owner transfer an atomic operation.

Test: bit FrameworksServicesTests:com.android.server.devicepolicy.TransferOwnershipMetadataManagerTest
Test: runtest -x frameworks/base/services/tests/servicestests/src/com/android/server/devicepolicy/OwnerTransferParamsManagerTest.java
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertDeviceOwnership_noMetadataFile
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertDeviceOwnership_adminAndDeviceMigrated
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertDeviceOwnership_deviceNotMigrated
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertDeviceOwnership_adminAndDeviceNotMigrated
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertProfileOwnership_noMetadataFile
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertProfileOwnership_adminAndProfileMigrated
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertProfileOwnership_profileNotMigrated
Test: bit FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest#testRevertProfileOwnership_adminAndProfileNotMigrated
Bug: 69543005

(cherry picked from commit 5a6d391dedcdec13fcc4cf1770e7bf9fc1be8643)

Change-Id: Ic2d729d48fdb47b0ebd60030b45615b0cec174a2