Summary:
Motivation:
* We maintain two different implementation of <TextInput> (multilined and singlelined), this change makes the implementations much similar which will help us to support and improve both of them in the (near) future;
* We have to have separated RCTView-based container view for (TextField) to support sofisticated bordering and so on;
* It opens to us possibility to unify UITextView and UITextField subclasses and remove code duplication across RCTTextView and RCTTextField;
* Making things decoupled in general will allow us to fix existing bugs with events.
Reviewed By: mmmulani
Differential Revision: D5083010
fbshipit-source-id: 2f2d42c2244d2b39256c51480c1f16f4e3947c01
e13b9c6e49