Add new app close implementation.

- We remove the fling completely
- We set damping to 1 for x/y springs so there is no
  bounciness, and updated the stiffness and bounds to tighten
  up the path to the final location.
- During the animation, we translate all launcher content
  down
- When the x/y springs, and rect animator all finish,
  we use a spring to bounce the launcher content back up

- Added AppCloseConfig so that the entire animation can
  be defined in one location, with getter methods so that
  all the involved parties of the animation can access the
  current value.
- The animations are all defined linearly, and then
  interpolated over using a 3 point curve.

Building behind feature flag as we tune the values.

Bug: 173107751
Test: manual, visual
Change-Id: I83ad0fa2c4234cf30004240d43e191354595adc8

quickstep/src/com/android/launcher3/QuickstepTransitionManager.java

@@ -693,7 +693,7 @@ public class QuickstepTransitionManager implements OnDeviceProfileChangeListener
                             matrix.postTranslate(windowTransX0, windowTransY0);
                         }
 
-                        floatingView.update(floatingIconBounds, mIconAlpha.value, percent, 0f,
+                        floatingView.update(mIconAlpha.value, 255, floatingIconBounds, percent, 0f,
                                 mWindowRadius.value * scale, true /* isOpening */);
                         builder.withMatrix(matrix)
                                 .withWindowCrop(crop)