Only hidden device-types need to have restricted visibility
health checks, ensure that restricted devices can have public
health checks. (Device restriction only affects who can submit
and lava-health is always allowed.)
This change prevents admins needing to change health checks when
changing a device to restricted submissions for triage purposes.

Change-Id: Ie0aedb4858e677c9c9784b2412bc1149dc7cbdff