Bug 939672 - Patch 1/2: [bluedroid] Add fallback BluetoothHfpManager, r=gyeh

--HG--
rename : dom/bluetooth/bluedroid/BluetoothHfpManager.cpp => dom/bluetooth/bluedroid/hfp/BluetoothHfpManager.cpp
rename : dom/bluetooth/bluedroid/BluetoothHfpManager.h => dom/bluetooth/bluedroid/hfp/BluetoothHfpManager.h
Bug 939672 - Patch 2/2: Move NS_DECL_ISUPPORTS and NS_DECL_NSIOBSERVER into BluetoothProfileManagerBase.h
Bug 939672 - Patch 3: CLOBBER change for moving file location