Fix ChangeTransform to work with interruptions

Bug 17372872

If ChangeTransform was interrupted after its animation completed,
but before the parent's Transition completed, it would think
that its start location was relative to its parent's current
position and not relative to its end position.

Change-Id: Iad25aafc03c41c1e0a7530548fb38acafbaffb8e
1 file changed