closes #5659

* Add accessibilityLabel to tight and left buttons

* Set default accessibility label to back button

Co-authored-by: Yogev Ben David <yogevbd@wix.com>

Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>

* Add bottomTabLongPressed event on iOS

* Fix indent

Co-authored-by: Yogev Ben David <yogevbd@wix.com>

* Added modalAttemptedToDismiss event with tests and docs

* Typo on pageSheet modal button label

* Update ModalScreen.js

* Fixed button testID

* Revert label to fix test cases

Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>
Co-authored-by: Yogev Ben David <yogevbd@wix.com>

This is required so that a component displayed in a modal can react to the dismiss of the modal it's presented in. This change aligns behaviour with iOS.
closes #5830

When calling mergeOptions to update BottomTabs visibility, apply the visibility only if the child is visible.

* Updated ahbottomnavigation to 3.0.9

Motivation: Try to reproduce #5833

* Fix pushing screens to external components inside modal

Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>

New class name is 54% shorter, thus better.

This commit fixes hiding the back button with `backButton.visible: false` in mergeOptions. It didn't work on Android.

Send componentType field in componentDidAppear and componentDidDisappear events.

The new field is either:
- TopBarButton
- TopBarTitle
- TopBarBackground
- Component

This works around a rare edge case where applying the translucent flag
resulted in white screens when pushing or showing modals.
So far, I've managed to reproduce this only when when showing external component as modal in the Wix app.

closes #5742

Will be used for shared element transition showcase

* Fix topBar transparent background on iOS 12

* Fix unit test iOS destination

Called each time a screen is popped, either due to `Navigation.pop` or pop gesture.
closes #3941 

Navigation.events().registerScreenPoppedListener(({ componentId }) => {

});

Default options were not taken into account when determining bottom inset.
Closes #5738

bottomTab.icon accepts a string as well as required asset - this was not reflected properly in TypeScript and implementation was missing from Android.
closes #5759