Only populate activity view when we're showing it

Follow up comments from ag/6274141

Test: manual - expand and collapse some activity view based bubbles
      atest BubbleTestController
Bug: 123543995
Change-Id: I9024f074bdf91e9d2955bdb1007fb55c48e35c21

packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java

@@ -107,8 +107,10 @@ public class BubbleExpandedView extends LinearLayout implements View.OnClickList
     private ActivityView.StateCallback mStateCallback = new ActivityView.StateCallback() {
         @Override
         public void onActivityViewReady(ActivityView view) {
-            mActivityViewReady = true;
-            mActivityView.startActivity(mBubbleIntent);
+            if (!mActivityViewReady) {
+                mActivityViewReady = true;
+                mActivityView.startActivity(mBubbleIntent);
+            }
         }
 
         @Override
@@ -262,6 +264,12 @@ public class BubbleExpandedView extends LinearLayout implements View.OnClickList
         updateHeaderView();
         updatePermissionView();
         updateExpandedView();
+    }
+
+    /**
+     * Lets activity view know it should be shown / populated.
+     */
+    public void populateActivityView() {
         mActivityView.setCallback(mStateCallback);
     }
 

packages/SystemUI/src/com/android/systemui/bubbles/BubbleStackView.java

@@ -707,6 +707,7 @@ public class BubbleStackView extends FrameLayout implements BubbleTouchHandler.F
         mExpandedViewContainer.removeAllViews();
         if (mExpandedBubble != null && mIsExpanded) {
             mExpandedViewContainer.addView(mExpandedBubble.expandedView);
+            mExpandedBubble.expandedView.populateActivityView();
             mExpandedViewContainer.setVisibility(mIsExpanded ? VISIBLE : GONE);
         }
     }