How can I connect my Logitech "unifying" controller, to my Android device over Bluetooth?

Logitech's Unifying standard seems very similar to Bluetooth (same 5-device limit, similar range, similar specs from what I've read on the Internet). I'm trying to connect a Logitech F710 wireless controller, to my Android phone over Bluetooth. It works if I plug the "unifying" USB dongle into a USB OTG cable (micro-USB to full-USB converter) and plug said OTG in my phone. It works fine (fiddling on the controller moves things around on-screen). But I need it to work without plugging into the phone's MicroUSB port. I've got a Samsung/Oculus Gear VR (that connects to the phone's MicroUSB port). But when I hook up the OTG cable to my Gear VR's charging Micro-USB port, it just doesn't work. I've read on Reddit that if you prevent the Oculus app from starting when you plug in your Android device (I'm using a Samsung Galaxy Note 5), then the Gear VR's charging port also registers that stuff. So any suggestions?