Summary:
Changelog:
[Internal][Changed] - Remove keyExtractor from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
[General][Changed] - Remove data as a prop for VirtualizedSectionList. In the reactnative.dev docs it mentions that sections is the equivalent for *SectionList: https://reactnative.dev/docs/sectionlist#sections
[General][Changed] - Change export type of VirtualizedSectionList and wrap component updates in act in test.
[Internal] - Remove FlowFixMe from VirtualizedSectionList
Reviewed By: kacieb
Differential Revision: D27271493
fbshipit-source-id: f83bdcce9c71c140c8a8fb6f0ecd9bb520fcb85b