Account for background drawable size changing when lrtb properties change

LayoutTransition may set the left, right, top, bottom properties of a View when
animating it. If the View has a background drawable, and if these properties change
the actual dimensions of the view, then the background drawable must be informed
of the size change in order to display itself correctly.

Change-Id: I8ae47a051b250d0d4bdee97b1f1b5d27fe3f7f8b