Translate the taskbar icons to match nav handle shape.

- We need to reset icon alignment whenever icon layout bound
  changes. This fixes the issue where we build an icon
  alignment animator before any of the views are laid out.
- Separated animation logic between.
  createTransientAnimToIsStashed and createAnimToIsStashed
* The values still require a bit more tuning but this gets us
  a lot closer to spec for many of the motion polish.

Bug: 267806083
Bug: 246634367
Bug: 246635237
Test: manual
Change-Id: Id122134b22ef4e418ce632e4a8137239dc8bb313

quickstep/src/com/android/launcher3/taskbar/TaskbarView.java

@@ -58,6 +58,8 @@ public class TaskbarView extends FrameLayout implements FolderIcon.FolderIconPar
     private static final String TAG = TaskbarView.class.getSimpleName();
 
     private static final float TASKBAR_BACKGROUND_LUMINANCE = 0.30f;
+    private static final Rect sTmpRect = new Rect();
+
     public int mThemeIconsBackground;
 
     private final int[] mTempOutLocation = new int[2];
@@ -339,6 +341,9 @@ public class TaskbarView extends FrameLayout implements FolderIcon.FolderIconPar
                     (right - navSpaceNeeded) - iconEnd;
             iconEnd += offset;
         }
+
+        sTmpRect.set(mIconLayoutBounds);
+
         // Layout the children
         mIconLayoutBounds.right = iconEnd;
         mIconLayoutBounds.top = (bottom - top - mIconTouchSize) / 2;
@@ -379,6 +384,10 @@ public class TaskbarView extends FrameLayout implements FolderIcon.FolderIconPar
             mIconLayoutBounds.right = center + distanceFromCenter;
             mIconLayoutBounds.left = center - distanceFromCenter;
         }
+
+        if (!sTmpRect.equals(mIconLayoutBounds)) {
+            mControllerCallbacks.notifyIconLayoutBoundsChanged();
+        }
     }
 
     @Override