[FIX] ListBinding: Fire change event if length changes

When the length of the list data has changed, but the visible range was
unmodified, the ListBinding did not fire a change event, so controls
couldn't update their scrollbar/length display.

CSS: 0120061532 0001449886 2014
Change-Id: I14d563a5e20be3f0055682f7ad242f4340082cba
Merge "[FIX] ListBinding: Fire change event if length changes"