private static boolean isProfileWithoutOwner(final Context context, final UserHandle profile) {
		final Optional<ComponentName> owner = DevicePolicies.getProfileOwnerAsUser(context, profile);
		return owner == null || ! owner.isPresent();
	}
Implementation of Island / Mainland setup & shutdown.

Created by Oasis on 2017/3/8.
mobile/src/main/java/com/oasisfeng/island/setup/IslandSetup.java