Fix Flow type for onAccessibilityEscape
Fix Flow type for onAccessibilityEscape

Summary: This was added in [this PR](https://github.com/facebook/react-native/pull/22047) with a non strict type

Reviewed By: yungsters

Differential Revision: D13617894

fbshipit-source-id: 849f83203556e2830ac725570c9053503377f4be

exponent/react-native,exponentjs/react-native,hammerandchisel/react-native,exponent/react-native,hammerandchisel/react-native,facebook/react-native,exponentjs/react-native,janicduplessis/react-native,hoangpham95/react-native,pandiaraj44/react-native,janicduplessis/react-native,myntra/react-native,myntra/react-native,exponent/react-native,hoangpham95/react-native,exponentjs/react-native,janicduplessis/react-native,arthuralee/react-native,hammerandchisel/react-native,exponentjs/react-native,exponent/react-native,facebook/react-native,exponent/react-native,janicduplessis/react-native,exponentjs/react-native,arthuralee/react-native,hoangpham95/react-native,exponent/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,facebook/react-native,hoangpham95/react-native,pandiaraj44/react-native,myntra/react-native,hammerandchisel/react-native,pandiaraj44/react-native,exponentjs/react-native,facebook/react-native,facebook/react-native,exponent/react-native,exponent/react-native,facebook/react-native,hammerandchisel/react-native,hammerandchisel/react-native,hoangpham95/react-native,javache/react-native,myntra/react-native,hammerandchisel/react-native,hammerandchisel/react-native,arthuralee/react-native,myntra/react-native,myntra/react-native,facebook/react-native,facebook/react-native,myntra/react-native,javache/react-native,janicduplessis/react-native,exponentjs/react-native,javache/react-native,pandiaraj44/react-native,javache/react-native,exponentjs/react-native,pandiaraj44/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,arthuralee/react-native,javache/react-native,janicduplessis/react-native,pandiaraj44/react-native,pandiaraj44/react-native,facebook/react-native,javache/react-native,pandiaraj44/react-native,arthuralee/react-native,javache/react-native,janicduplessis/react-native,myntra/react-native,hoangpham95/react-native