Summary:
There was an issue that sometimes sticky headers would stop moving when re-rendering because we did not reattach events properly. This makes sure that we always detach and reatach on rerender in case the scroll view ref changes.
**Test plan**
Tested that this fixes issues with sticky headers we discovered when updating Expo to RN 0.44.
Closes https://github.com/facebook/react-native/pull/14012
Differential Revision: D5094418
Pulled By: javache
fbshipit-source-id: a56050ae786712e8a3de2a6e3b4e8749a2fde86e