Reverted commit D3735237

Summary:
Currently, text inputs do not scroll when inside other components like scroll
views. This fixes it by blocking any parent native component from taking the
responder when the text input is focused and is being scrolled. This fixes the
previous implementation, where the scroll view was not able to scroll on top of
other text inputs, even though they were not focused.
This makes the component similar to it's ios counterpart.

Reviewed By: foghina

Differential Revision: D3735237

fbshipit-source-id: 724f94a6e7332d03261a80f63ffa60d0e5846932

Libraries/Components/TextInput/TextInput.js

@@ -691,7 +691,6 @@ const TextInput = React.createClass({
       <TouchableWithoutFeedback
         onLayout={this.props.onLayout}
         onPress={this._onPress}
-        shouldBlockResponder={this.isFocused}
         accessible={this.props.accessible}
         accessibilityLabel={this.props.accessibilityLabel}
         accessibilityComponentType={this.props.accessibilityComponentType}

Libraries/Components/Touchable/Touchable.js

@@ -396,7 +396,6 @@ var TouchableMixin = {
       this._handleLongDelay.bind(this, e),
       longDelayMS + delayMS
     );
-    return this.props.shouldBlockResponder && this.props.shouldBlockResponder();
   },
 
   /**