Clear WidgetCell#mItem before recylcing a WidgetCell am: fbb82586a7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15255729

Change-Id: I75a02b246857cdef16d2324f4ab5937cf7423417
diff --git a/src/com/android/launcher3/widget/WidgetCell.java b/src/com/android/launcher3/widget/WidgetCell.java
index c3edcce..6605509 100644
--- a/src/com/android/launcher3/widget/WidgetCell.java
+++ b/src/com/android/launcher3/widget/WidgetCell.java
@@ -177,6 +177,7 @@
             mWidgetImageContainer.removeView(mAppWidgetHostViewPreview);
         }
         mAppWidgetHostViewPreview = null;
+        mItem = null;
     }
 
     public void setSourceContainer(int sourceContainer) {