Move BluetoothPhoneService to telecom.

BluetoothPhoneService needs to be in telecom to be aware of all types of
calls.  While in telephony, there's no way for it to know about
third-party sourced calls.

Additionally, conference calls for CDMA are no longer functional in the
telephony layer and needs to move to telecom to support BT commands on
CDMA calls.

Bug: 17475562
Change-Id: I443431291a3b0120d92b52dba2acca17a4c0c983