This should work on Jolla's Sailfish OS phones as they're running a legit Android in a sandbox. Unfortunately their hardware support is pretty abysmal if you want all features working - and since it's legit Android it's also not free (monetary) and Sailfish OS's UI toolkit is also not free (freedom).
edit: also, last time I checked, Bluetooth support for Android apps is terrible, basically only audio work(s|ed).