Summary: X-link: https://github.com/facebook/react-native/pull/44067 X-link: https://github.com/facebook/litho/pull/980 Pull Request resolved: https://github.com/facebook/yoga/pull/1643 Changelog [Internal]: - Added percentage value for flex layout gap - Wired up to pass proper available width and height to implement this feature Reviewed By: NickGerleman Differential Revision: D56002340 fbshipit-source-id: c0bc86ac70a1391f115c87da99c2ef411535f68b