Add CTS test for EnforcingAdmin#getComponentName

EnforcingAdmin#getComponentName method is exposed in ag/34326782. Add
CTS coverage for the method.

Flag: android.app.admin.flags.enforcing_admin_get_component_name_enabled
Bug: 414733570
Test: atest EnforcingAdminAndAuthorityTest

Change-Id: I1addde59d011a182867da2b449d90328a8318e3a
1 file changed