Don't use overlay to transition ImageViews.

Bug 15744992

MoveImage used an overlay to transition ImageViews. This
caused strange problems when ImageViews were contained in
other Views. The new ChangeImageTransform does a smooth
transition for changes in scale type and bounds.

Change-Id: Ia5021f4828f8f818a8699b3bdd38437aeba1cfc8
9 files changed