Remove usage of DevicePolicyManager#getDeviceOwnerType.

This is part of centralising logic around DPCs inside DPM to facilitate
non-DPC management.

Test: atest com.android.systemui.qs.QSSecurityFooterTest
Test: atest
com.android.systemui.statusbar.KeyguardIndicationControllerTest
Test: atest com.android.systemui.statusbar.policy.SecurityControllerTest
Test: atest com.android.server.devicepolicy.DevicePolicyManagerTest
Bug: 259960298
Change-Id: Ia863ac91d6a617c3ea8a827bc7f8fa31aa551e3d

Change-Id: I2e1d52fc0448945e1f09146be71493ddc106668e