Android: Added support for 'direction' to scrollTo.

This fix adds a new option (direction) to 'mobile: scrollTo'.
If 'horizontal' is provided (or if the view is a HorizontalScrollView),
we will call setAsHorizontalList() before commencing the scroll.

lib/devices/android/android-controller.js

@@ -545,12 +545,13 @@ androidController.drag = function (startX, startY, endX, endY, duration, touchCo
   }
 };
 
-androidController.scrollTo = function (elementId, text, cb) {
+androidController.scrollTo = function (elementId, text, direction, cb) {
   // instead of the elementId as the element to be scrolled too,
   // it's the scrollable view to swipe until the uiobject that has the
   // text is found.
   var opts = {
     text: text
+  , direction: direction
   , elementId: elementId
   };
   this.proxy(["element:scrollTo", opts], cb);