network: return connection path in ActivateAccessPoint()

Used to fix password box popup issue in front-end.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/c0d9158bdbb04f08a355e7e1ccfd4dce/
Change-Id: Ie6f78c27d5758b7352a2239f30b542ba48ec86da