Add SignInFactorCodeView (#237)

* update SignInFactorOneView.kt to use password view

* Add StrategyKeys.kt

* Add SignInFactorCodeHelper.kt

* Add a lot of kdoc and update other components

* use const

* update padding and add timer

* add functions for prepare

* add helpers for prepare and attempt

* Add test for SignInFactorCodeViewModel

* move tests

* add tests and update snapshots

* update field to use showResend

* add use another method

* move to common AuthHeaderView

* put toolbar in header view

* add kdoc

* update visibility and move text button to button package

* add kdoc

* update password view to use an impl

Author: swolfand