Summary:
This adds a simple debug UI to verify the keyboard events "keyboardDidShow" and "keyboardWillShow"
Changelog:
[Internal][Added] - Add "KeyboardExample" to RNTester
Reviewed By: cortinico
Differential Revision: D38500869
fbshipit-source-id: 99913a05849a7dd27dfdee2d622058b9c2604a7f