Bug 1119176: Implement bt_os_callouts_t in bluetoothd.
Bug 1119176: Implement bt_os_callouts_t in bluetoothd.

tdz/platform_system_bluetoothd,hobinjk/system-bluetoothd,BruceSunMozilla/platform_system_bluetoothd,andyvand/platform_system_bluetoothd,hobinjk/platform_system_bluetoothd,mozilla-b2g/platform_system_bluetoothd