Bug 960861 - mozMobileConnections should not be requisites for airplane mode

- add Radio.js
- add Radio related tests
- use this radio service in ariplaneMode
Bug 960500 - [Buri][Data usage] Show a specific message when launching data usage app under airplane mode scenario
Bug 975265 - Add the support for LTE network types
Bug 984718 - Fix jshint errors for autocorrect.js
Bug 984718 - Fix jshint errors for boot.js
Bug 984718 - Fix jshint errors for doublespace.js
Bug 984718 - Fix jshint errors for input_field.js
Bug 984718 - Fix jshint errors for key.js
Bug 984718 - Fix jshint errors for layout.js
Bug 984718 - Fix jshint errors for page.js
Bug 981626 - [Sora][gallery]Can't be shared when select picture and video simultaneously
Bug 971546 - [System2] Instantiable Screenshot
Bug 971577 - [System] Make visibility manager instantiable
Bug 961800 - Implement Child Window Factory

Conflicts:
	apps/system/js/app_transition_controller.js
	apps/system/js/app_window.js
	apps/system/js/app_window_manager.js
	apps/system/js/cards_view.js
	apps/system/style/window.css
Bug 971556 - [System2] Instantiable SourceView.
Bug 970028 - Nicer activity opener animation
Bug 974828 - [Settings][dsds] Outgoing data confirmation is wrong

- update test
- change the way about how we show confirm window
Bug 929917 - UI Test app for Firefox Accounts DOM API
Bug 985787 - Change requireApp to require to make includes work in search unit test
Merge pull request #17263 from gasolin/bubble-merge225

cherry-pick Bubble-tea