introduce device specific toggle switch (Android/ios)

[VDuczekW]

Device specific toggles exist in source (small/medium size) but AR doesn't yet have a way of knowing which device it is being run on. Introducing this logic, AR should render different toggles for ios and android.

source toggle: https://guardian.github.io/csnx/?path=/story/source-react-components-development-kitchen_toggleswitchapps--android-no-label