Update ScrollResponder.js to use new scrollTo API

Summary:`scrollResponderInputMeasureAndScrollToKeyboard` is the only non-deprecated method in `ScrollResponder.js` that doesn't use the [new `scrollTo` API](6941c4e). The other method that uses the deprecated API (`scrollResponderScrollWithoutAnimationTo`) is also deprecated, so it has been left unaltered.
Closes #5990

Differential Revision: D2953916

Pulled By: nicklockwood

fb-gh-sync-id: d692c598e6b85d1050e58b87146d01b031653a49
shipit-source-id: d692c598e6b85d1050e58b87146d01b031653a49

Libraries/Components/ScrollResponder.js

@@ -461,7 +461,7 @@ var ScrollResponderMixin = {
     if (this.preventNegativeScrollOffset) {
       scrollOffsetY = Math.max(0, scrollOffsetY);
     }
-    this.scrollResponderScrollTo(0, scrollOffsetY);
+    this.scrollResponderScrollTo({x: 0, y: scrollOffsetY, animated: true});
 
     this.additionalOffset = 0;
     this.preventNegativeScrollOffset = false;