Fixed an issue on android where carousel would snap to a page prematurly

[mikeredbit]

The HorizontalScrollView's MotionEventActions.Down event was never firing, possibly due to a child element consuming the event. I've added a call to OnMotionEventActionsDown() at the beginning of the Move event's case block that will fire the down event's code only if _motionDown is false. This will ensure that the down event's code gets executed.

[chrisriesgo]

@mikeredbit - Thanks for contributing back :) Sorry it's been so long for me to respond. Do you happen to remember the use-case that you were running into where this was an issue? The issue wasn't immediately obvious to me, so I'm just trying to learn/understand.