[Connector - Control Point] Add new APIs

- Add a disconnect function in connector
- Add a finalize function in control point

Signed-off-by: Regis Merlino <regis.merlino@intel.com>
[Control Point] Rename "finalize" to "stop-service"

Signed-off-by: Regis Merlino <regis.merlino@intel.com>