AOKP/system_bluetooth — pull request #1 by Efpophis (2012-03-22 16:12:26+00:00)
Title: Allow setting BT MAC address from filesystem and/or properties.

Allow fetching bluetooth MAC address from (in order of precedence):
/efs/imei/bt.txt
/data/misc/bluetoothd/address
property "ril.bt_macaddr"
path specified by property "ro.bt.bdaddr_path"

First of the above that is found sets the BT mac address.