Fix bad RecyclerView issue

dispatchAddFinished() must be called by subclasses when done, either
immediately(if no animation will occur) or after the animation actually
finishes.

Test: Manual

Change-Id: I72b9da41f52b381e3531842aa1fb07e573c120cb
Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>

src/com/android/messaging/ui/conversation/ConversationFragment.java

@@ -564,6 +564,7 @@ public class ConversationFragment extends Fragment implements ConversationDataLi
                             @Override
                             public void run() {
                                 view.setAlpha(1);
+                                dispatchAddFinished(holder);
                             }
                         });
                     mPopupTransitionAnimation.startAfterLayoutComplete();