Add E2E Snapshot Tests for Button

[chiaramooney]

Add E2E Jest Snapshot Tests for Button. Tests should exist as samples within RNTester.

STATUS TYPES

Status	Description
Not Implemented	Prop is not implemented for given architecture.
Not Completed	No test or sample exists for the prop.
Sample Completed	Sample exists for the prop, but sample is not run in a Jest Snapshot Test.
Completed	Sample and Snapshot test exists for the prop.

PROPS STATUS FOR BUTTON

Test Description	Status (Paper)	Status (Fabric)	Notes
Default Case	Completed – RNTester	Completed
AccessibilityLabel	Completed – RNTester	Completed
AccessibilityActions	Not Completed	Not Completed
AccessibilityRole	Completed – RNTester 10/22 Pass	Completed
AccessibilityHint	Completed – RNTester 10/22 Pass	Completed
AccessibilityState	Completed – RNTester	Completed
AccessibilityPosInSet	Not Completed	Completed
AccessibilitySetSize	Not Completed	Completed
AccessibilityValue	Not Completed	Completed
AccessibilityLiveRegion	Completed – RNTester	Completed
onAccessibilityAction	Not Completed	Not Completed
onPress	Completed – RNTester	Completed
Color	Completed – RNTester	Completed
Disabled	Completed – RNTester	Completed
testID	Completed – RNTester	Completed
Style – elevation	Not Implemented	Not Implemented
Accessible	Completed – RNTester 10/22 Pass	Completed
Focusable	Completed – RNTester 10/22 Pass	Completed
NextFocus*	Not Implemented	Not Implemented