Yesterday night I played with Bluetooth, so I flashed the Xiaomi patch and after that I start manually adding or changing Bluetooth packages. It seems that:
Bluetooth.apk is not used, even removing it the system BT works
BrcmBluetoothServices.apk is not used, even removing it the system BT works
com.htc.android.bluetooth.jar IS NEEDED (I've pusched the stock one or the Xiaomi one but it seems there is no difference in the bluetooth functions)
I still cannot sync call logs when attached to car kit?
Is there anybody that knows how BT stack is implemented in MIUI so that I can dig it a little more?