Unloading thumbnails from task views once recents is hidden

- Re-enabling the high res thumbnail loader, ensuring that we clean up
  the visible recent tasks when the associated views are removed
- When the recents state is re-entered, we will trigger the loading of
  the data anew (which will usually just fetch data from the existing
  cache if launcher was not stopped)

Bug: 74537246
Change-Id: I9cd69015461e1de34b4b65faeb9adb8aebd1dd3d
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index d39ec3e..eb73879 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -756,11 +756,13 @@
 
     @Override
     public void onViewAdded(View child) {
+        super.onViewAdded(child);
         dispatchPageCountChanged();
     }
 
     @Override
     public void onViewRemoved(View child) {
+        super.onViewRemoved(child);
         mCurrentPage = validateNewPage(mCurrentPage);
         dispatchPageCountChanged();
     }