Don't let ConversationCursor do work during scroll

Bug: 9032162
Change-Id: Id47fd9c2a1cab01b798a0c24a5802a3d059d5c70
diff --git a/src/com/android/mail/ui/AbstractActivityController.java b/src/com/android/mail/ui/AbstractActivityController.java
index 9a61f7d..928b2f8 100644
--- a/src/com/android/mail/ui/AbstractActivityController.java
+++ b/src/com/android/mail/ui/AbstractActivityController.java
@@ -2909,10 +2909,7 @@
         boolean isAnimating = false;
         ConversationListFragment convListFragment = getConversationListFragment();
         if (convListFragment != null) {
-            AnimatedAdapter adapter = convListFragment.getAnimatedAdapter();
-            if (adapter != null) {
-                isAnimating = adapter.isAnimating();
-            }
+            isAnimating = convListFragment.isAnimating();
         }
         return isAnimating;
     }