Remove ownerName as argument in DPMS.setDeviceOwner

As ownerName has been removed from OwnersData.ownerInfo, there is no need to take
it as an argument in DPMS.setDeviceOwener or for any other methods that
call it.

Bug: 240562946
Test: atest FrameworksServicesTests:com.android.server.devicepolicy.DevicePolicyManagerTest
Test: atest SetDeviceownerPolicyTaskTest
Change-Id: I7748a5cf152e9327854623fbac5f8ed3f5d3f28a