Refactor app open animation so that FloatingIconView tracks window.

Before, the window used to track the FloatingIconView. With this refactor,
both app open and app close use the same update method.

With the refactor, we can now use adaptive icons to morph the icon into the
size of the window.

Movement/interpolators are still the same as the original except for the
alpha and the clip animation. To ensure a perfect tradeoff, we wait for the
icon to match the size and shape of the window before crossfading.
Currently it is set up so that the tradeoff happens when the animation is
15% done, but this can be tuned later.

Bug: 122843905

Change-Id: I7d3edbefffb15fe26958a62ab33cf23dc1203908