Fix Launcher icons not animated during unfold

If icons are re-bound during the animation, they were not moved. I was able to reproduce this case 100% of times by folding, restarting launcher and unfolding. From a perfetto trace it seems that in this case `finishBindingItems` was called after the animation already started, therefore not registering any view.

With this cl, items are animated also after they are rebound.

Bug: 197834977
Test: folded -> restarted launcher -> unfolded -> verified icons are now moving towards the center
Change-Id: I5b001c502860c17d6ea5d54d099f04b2ddf1820a