More visibility docs
More visibility docs

Summary: docs for VisibilityChangedEvent and LithoView.setVisibilityHint

Reviewed By: IanChilds

Differential Revision: D9654156

fbshipit-source-id: cfc76ee5e46966f4e1ece6b6093d55f8f18abdc7

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho