Bug 843452 - Part a-1.1: Gonk backend
Bug 843452 - Part a-1.2: Refactor radio Handler
Bug 843452 - Part a-1.3: Update data registration state
Bug 843452 - Part a-1.4: lastKnownHomeNetwork
Bug 843452 - Part b: Gonk backend IPC
Bug 843452 - Part c-1: Marionette tests - test_mobile_data_connection.js
Bug 843452 - Part c-2: Marionette tests - test_mobile_data_state.js
Bug 843452 - Part c-3: Marionette tests - test_mobile_network.js