no scroll for images with height and size more than the dispay

I have an image with w/h more than the screen size. So i programmatically create a new view. When i zoom there is a scroll property. But on the initial position there is no scroll

```
mMapView = new MapView(this);
mMapView.setLayoutParams(new LayoutParams(bitmap.getWidth(), bitmap.getHeight()));
mMapView.setImageBitmap(bitmap);
```

Start by reproducing the issue with the MapView snippet and an image larger than the screen, comparing the initial position with the zoomed state. Trace MapView's layout and scrolling behavior; done means the oversized image can scroll from its initial state as well as after zooming.

Written by the indexing model from the issue text.