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

src/com/android/launcher3/Workspace.java

@@ -3323,6 +3323,18 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
         }
     }
 
+    /**
+     * Set the given view's pivot point to match the workspace's, so that it scales together. Since
+     * both this view and workspace can move, transform the point manually instead of using
+     * dragLayer.getDescendantCoordRelativeToSelf and related methods.
+     */
+    public void setPivotToScaleWithSelf(View sibling) {
+        sibling.setPivotY(getPivotY() + getTop()
+                - sibling.getTop() - sibling.getTranslationY());
+        sibling.setPivotX(getPivotX() + getLeft()
+                - sibling.getLeft() - sibling.getTranslationX());
+    }
+
     @Override
     public int getExpectedHeight() {
         return getMeasuredHeight() <= 0 || !mIsLayoutValid