Test item psid against PermissionSet::PUBLIC constant instead in ActivityPub\Objects
Test item psid against PermissionSet::PUBLIC constant instead in ActivityPub\Objects

- Address https://github.com/friendica/friendica/issues/10755#issuecomment-950393419

friendica/friendica,tobiasd/friendica,annando/friendica,friendica/friendica,annando/friendica,annando/friendica,friendica/friendica,friendica/friendica,friendica/friendica,annando/friendica,tobiasd/friendica,annando/friendica,tobiasd/friendica,tobiasd/friendica,tobiasd/friendica