* added backgroundImages options

* update readme

* backgroundImage fix

* added unit test

* async await for push and showModal

* async await for push and showModal

* refactored custom transitions

* refactored custom animations

* drawUnder for topBar and bottomTabs

* test fix

Slightly changes topTabs node declaration and removed the container from it.

* Further work on TopTabs and some refactoring

* OptionsPresenter receives views as params
* Remove TopBar and style logic from ViewControllers, these are the OptionsPresenters concern
* StackAnimator isn't coupled to LinearLayout
* Convert Runnable to lambda
* ContainerLayout now implements ReactContainer interface
* Enable desugaring in playground app

* TopTabs unit tests

* Restructure TopTabsLayout

* Refactor Containers

* Consolidate view creators. For some reason we had double abstraction layer and had creators invoking creators
* Rename ContainerView to ContainerLayout

* fix test

* side menu visibility options

* e2e fix

* Rename ContainerView related classes (#2328)

* Rename ContainerView related classes

* fix test

* rename ContainerViewCreator

* splitted showSideMenu into two methods