Summary:
Introduces support for `onPressIn` and `onPressOut` on the `TextInput` component.
This makes it possible to add visual feedback when users touch interact with `TextInput` components.
Changelog:
[General][Added] - TextInput now supports `onPressIn` and `onPressOut`.
Reviewed By: TheSavior
Differential Revision: D23514333
fbshipit-source-id: 1790e977b78f1c293d5476aef8613547f27d6731