This patch moves BluetoothInterface.{cpp,h} to the generic section
of Gecko's Bluetooth code, and the Bluedroid implementation into
the new files BluetoothHalImplementation.{cpp,h}.
BluetoothHalImplementation.{cpp,h} contains all Bluedroid-specific
code. The classes in BluetoothInterface.{cpp,h} are now interfaces
for Gecko.
--HG--
rename : dom/bluetooth2/bluedroid/BluetoothInterface.cpp => dom/bluetooth2/bluedroid/BluetoothHALInterface.cpp