How to activate an USB Bluetooth dongle on BPI M2+ with Android 7.0 OS?

Hi everyone. I’m using a Banana Pi M2 + with Android OS 7.0. I have to turn off the Bluetooth on board and use a Bluetooth Low Energy USB dongle. How can I do, so that, the Bluetooth module used by the single-board is the one of the dongle and not the on-board one? Thanks for your help.