Fix group creation through group info request

Closes #6763
// FREEBIE

src/org/thoughtcrime/securesms/database/GroupDatabase.java

@@ -136,6 +136,7 @@ public class GroupDatabase extends Database {
     contentValues.put(ACTIVE, 1);
 
     databaseHelper.getWritableDatabase().insert(TABLE_NAME, null, contentValues);
+    RecipientFactory.clearCache(context);
     notifyConversationListListeners();
   }