* feat(mobile/navigation) updated screens that have footer

* feat(chat/native) reverted style change

* feat(chat/native) reverted changes and added input vertical padding

* feat(base/modal) replaced headerHeight with top safe area inset

* feat(carmode/native) removed unused import and fixed linter

* feat(chat/polls/native) reverted style changes

* feat(base/modal) added isModalPresentation default prop

* feat(base/modal) made isModalPresentation optional

* feat(base/modal) headerHeight based on top notch devices

* feat(polls) updated styles

* feat(base/modal) updated comment

React Navigation v6.

Introduce navigation for all in-conference screens.