There is no prioritization in the BT stack and the order in the config file determines which connection wins.
There are some applications which can rearrange the order, e.g. https://play.google.com/store/apps/details?id=de.bluetoothcpm&hl=en_US&gl=US but functionality may depend on OEM and carrier "enhancements", as usual.
There are some applications which can rearrange the order, e.g. https://play.google.com/store/apps/details?id=de.bluetoothcpm&hl=en_US&gl=US but functionality may depend on OEM and carrier "enhancements", as usual.