== Switch Bluetooth stack bewteen bluez/bluedroid ==
For version JB 4.2, if you want to use bluez on JB, you need to modify some files.
See [Bug 911038] <br/>
== How does Gecko choose to use bluez or bluedroid? ==
In configure.in, it checks whether folder path external/bluetooth/bluez or external/bluetooth/bluedroid exists.
== Bluetooth interfaces ==
* bt_interface_t