Update on a few DevicePolicyManager APIs for affiliated PO

- Disallow managed profile from disabling keyguard and statusBar as it
  has no effect
- Removed the ability for affiliated profile owner to set device owner
  lockscreen message, as the message is not per user but set globally,
  where the original intention is to set a per user lockscreen message
- Updated javadoc accordingly

Bug: 64383519
Test: Invoking setKeyguardDisabled and setStatusBarDisabled with managed profile fails
Change-Id: Ib3fdf44f55a7c5913ea38647c582bc962329c842