Our boy from AT&T S5 thread found the path using Nova Launcher. Please check his original thread so we can thank him. This is super exciting.
We have gotten closer to finding out how to unlock the feature now. Please confirm Verizon users, that this shows up on your screens as well. We all got it to show up, but testing shows it doesn't work as it is. We will need a dev to unlock this puppy. Bust this wide open
-your friendly AT&T neighbor