Summary:
Add an example for Pager built with NavigationTransitioner & Animated.View
This example demostrates how to apply pre-defined gesture handling and
animation styles to the <Animated.View /> to build a Pager navigator.
Reviewed By: ericvicenti
Differential Revision: D3495807
fbshipit-source-id: 08e275010888925bc9fd1840e7052f975c95ad63
