Summary:
Previously type Options had excludeActivityTypes property, but in RCTActionSheetManager.m and docs this property is named excludedActivityTypes.
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Want to fix error in flow types
Actually, it seems there aren't any need for test plan for this PR. Just fix a mistyping error.
Closes https://github.com/facebook/react-native/pull/15881
Differential Revision: D5813539
Pulled By: ericnakagawa
fbshipit-source-id: 7d1269d4c177f920869bf6554f14af6db7a741ee