Don't display the last seen divider for outgoing calls

// FREEBIE

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

@@ -41,7 +41,8 @@ public interface MmsSmsColumns {
     protected static final long[] OUTGOING_MESSAGE_TYPES = {BASE_OUTBOX_TYPE, BASE_SENT_TYPE,
                                                             BASE_SENDING_TYPE, BASE_SENT_FAILED_TYPE,
                                                             BASE_PENDING_SECURE_SMS_FALLBACK,
-                                                            BASE_PENDING_INSECURE_SMS_FALLBACK};
+                                                            BASE_PENDING_INSECURE_SMS_FALLBACK,
+                                                            OUTGOING_CALL_TYPE};
 
     // Message attributes
     protected static final long MESSAGE_ATTRIBUTE_MASK = 0xE0;