Fixed a flickering of the icon when it goes into the shelf

We can adjust the Pivot such that the scaling doesn't happen
irregularly and that the animation is smooth.

Change-Id: Ib2e42a20430e1c10950a197a4c04e7c64c7dec67
Test: add notification, no flicker
Fixes: 80270979

packages/SystemUI/src/com/android/systemui/statusbar/StatusBarIconView.java

@@ -197,6 +197,7 @@ public class StatusBarIconView extends AnimatedImageView implements StatusIconDi
                 mDarkAmount);
         final int outerBounds = mStatusBarIconSize;
         mIconScale = (float)imageBounds / (float)outerBounds;
+        updatePivot();
     }
 
     private void updateIconScaleForSystemIcons() {
@@ -859,6 +860,12 @@ public class StatusBarIconView extends AnimatedImageView implements StatusIconDi
             mLayoutRunnable.run();
             mLayoutRunnable = null;
         }
+        updatePivot();
+    }
+
+    private void updatePivot() {
+        setPivotX((1 - mIconScale) / 2.0f * getWidth());
+        setPivotY((getHeight() - mIconScale * getWidth()) / 2.0f);
     }
 
     public void executeOnLayout(Runnable runnable) {