model: properly handle in-call text messages

Tuleap: #124
Change-Id: I967149b3ed82bfb4180f7f90e9be7698c8fa3f34

ring-android/app/src/main/java/cx/ring/fragments/CallListFragment.java

@@ -466,7 +466,7 @@ public class CallListFragment extends Fragment implements SearchView.OnQueryText
             calls.clear();
             for (Conversation c : list) {
                 if (!c.getAccountsUsed().isEmpty())
-                    calls.addAll(list);
+                    calls.add(c);
             }
             notifyDataSetChanged();
         }