Fix crash when opening bubble overflow

BubbleExpandedView needs a BubbleStackView reference, without that
there could be an NPE in various locations.

Also uses the correct parent view to setup the overflow.

Test: manual - tap on the overflow, observe no crash
Fixes: 150394526
Change-Id: Ib1ae9353a0dfd60ac8b6eb4f94b5b0cc5bc47811
diff --git a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleOverflow.java b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleOverflow.java
index a0e7449..313bb42 100644
--- a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleOverflow.java
+++ b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleOverflow.java
@@ -62,11 +62,12 @@
                 R.dimen.bubble_overflow_icon_bitmap_size);
     }
 
-    public void setUpOverflow(ViewGroup parentViewGroup) {
+    void setUpOverflow(ViewGroup parentViewGroup, BubbleStackView stackView) {
         mOverflowExpandedView = (BubbleExpandedView) mInflater.inflate(
                 R.layout.bubble_expanded_view, parentViewGroup /* root */,
                 false /* attachToRoot */);
         mOverflowExpandedView.setOverflow(true);
+        mOverflowExpandedView.setStackView(stackView);
 
         updateIcon(mContext, parentViewGroup);
     }
diff --git a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
index df8e394..cff62c1 100644
--- a/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java
@@ -522,8 +522,8 @@
     private void setUpOverflow() {
         int overflowBtnIndex = 0;
         if (mBubbleOverflow == null) {
-            mBubbleOverflow = new BubbleOverflow(mContext);
-            mBubbleOverflow.setUpOverflow(this);
+            mBubbleOverflow = new BubbleOverflow(getContext());
+            mBubbleOverflow.setUpOverflow(mBubbleContainer, this);
         } else {
             mBubbleContainer.removeView(mBubbleOverflow.getBtn());
             mBubbleOverflow.updateIcon(mContext, this);