default hitSlop values to 0 (#22281)
default hitSlop values to 0 (#22281)

Summary:
Experienced a `TouchableOpacity` releasing the `PanResponder` without invoking `onPress` due to a missing a direction key in the `hitSlop` prop; The missing key caused the corresponding pressExpand to become NaN which causes `isTouchWithinActive` to become falsey, when it should be truthy.

If defaulting to 0 is undesired behavior, I'm happy to take a different approach.
Pull Request resolved: https://github.com/facebook/react-native/pull/22281

Differential Revision: D13374335

Pulled By: cpojer

fbshipit-source-id: f9d28e51b9d9c45aed42bea2df3d844a799fa827

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