The Language switcher will be used in couple places:
- Toolbar, if the AMC is off
- both overflow mmenus when AMC is on
To make code DRY, first we should provide a single way to
create Language Switcher menu element, so we can use same way
in all possible scenarios.
Bug: T224735
Change-Id: I5ba0dbad7089012c7fd1bfc43787775c7e36d575
Piotr Miazga