RN: Add `close` to SwipeableRow

Reviewed By: sahrens

Differential Revision: D5365597

fbshipit-source-id: 18cc896b551ce11b64c85067d5f17b3614762814

Libraries/Experimental/SwipeableRow/SwipeableRow.js

@@ -190,6 +190,11 @@ const SwipeableRow = React.createClass({
     );
   },
 
+  close(): void {
+    this.props.onClose();
+    this._animateToClosedPosition();
+  },
+
   _onSwipeableViewLayout(event: Object): void {
     this.setState({
       isSwipeableViewRendered: true,
@@ -268,6 +273,7 @@ const SwipeableRow = React.createClass({
       {
         duration,
         toValue,
+        useNativeDriver: true,
       },
     ).start(() => {
       this._previousLeft = toValue;