Summary:
Issue https://github.com/facebook/react-native/issues/30964 .When using a screen reader, flatlist does not announce entrance/ exit from the flat list.
## Changelog
[Android] [Changed] - Added support for accessibility role of "list" for flatlist and sectioned list
Pull Request resolved: https://github.com/facebook/react-native/pull/31630
Test Plan: I have added accessibility role prop in flatlist and sectioned list in rntester app, that will announce entrance/ exit from flatlist and sectioned list.
Reviewed By: kacieb
Differential Revision: D29599351
Pulled By: blavalla
fbshipit-source-id: e16ec69a694780d12f15f88a1e6bb5d7d77ac15f