Allow uninstalling DMRH when not used for management

Bug: 360807442
Test: btest a.d.c.DevicePolicyManagementRoleHolderTest
Change-Id: I023f78cef11fb7e8e9a92e2896cf94c9fcd1113b
Merged-In: I9fd8bed4a8203f3dbfa8dc4ea1388e7c8d136d9a
1 file changed