Fix dot & badge being on correct side for the first bubble added

* stackAnimationController#isStackOnLeftSide depends on the position
  being set which happens when a view gets added so we should add
  the view & then set mStackOnLeftOrWillBe
* removed unused code

Test: manual 1) have no bubbles
             2) add a bubble (needs to be on left side -- this is
                the default unless you've placed the stack on right
                side beforehand)
             => observe that the update dot & badge are on the right
                hand side of the bubble
Bug: 185438888
Change-Id: I6129aff7c352fad8d29a6c243549f0d3580d62c8

libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleStackView.java

@@ -1497,22 +1497,22 @@ public class BubbleStackView extends FrameLayout
             mStackAnimationController.setStackPosition(mPositioner.getDefaultStartPosition());
         }
 
-        if (getBubbleCount() == 0) {
-            mStackOnLeftOrWillBe = mStackAnimationController.isStackOnLeftSide();
-        }
-
         if (bubble.getIconView() == null) {
             return;
         }
 
+        mBubbleContainer.addView(bubble.getIconView(), 0,
+                new FrameLayout.LayoutParams(mPositioner.getBubbleSize(),
+                        mPositioner.getBubbleSize()));
+
+        if (getBubbleCount() == 0) {
+            mStackOnLeftOrWillBe = mStackAnimationController.isStackOnLeftSide();
+        }
         // Set the dot position to the opposite of the side the stack is resting on, since the stack
         // resting slightly off-screen would result in the dot also being off-screen.
         bubble.getIconView().setDotBadgeOnLeft(!mStackOnLeftOrWillBe /* onLeft */);
         bubble.getIconView().setOnClickListener(mBubbleClickListener);
         bubble.getIconView().setOnTouchListener(mBubbleTouchListener);
-        mBubbleContainer.addView(bubble.getIconView(), 0,
-                new FrameLayout.LayoutParams(mPositioner.getBubbleSize(),
-                        mPositioner.getBubbleSize()));
         updateBubbleShadows(false /* showForAllBubbles */);
         animateInFlyoutForBubble(bubble);
         requestUpdate();

libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/animation/StackAnimationController.java

@@ -124,9 +124,6 @@ public class StackAnimationController extends
      */
     private Rect mAnimatingToBounds = new Rect();
 
-    /** Initial starting location for the stack. */
-    @Nullable private BubbleStackView.RelativeStackPosition mStackStartPosition;
-
     /** Whether or not the stack's start position has been set. */
     private boolean mStackMovedToStartPosition = false;