Show disappearing messages setting menu on Note to Self conversation

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/menus/ConversationMenuHelper.kt

@@ -63,7 +63,7 @@ object ConversationMenuHelper {
         // Base menu (options that should always be present)
         inflater.inflate(R.menu.menu_conversation, menu)
         // Expiring messages
-        if (!isOpenGroup && (thread.hasApprovedMe() || thread.isClosedGroupRecipient)) {
+        if (!isOpenGroup && (thread.hasApprovedMe() || thread.isClosedGroupRecipient || thread.isLocalNumber)) {
             if (thread.expireMessages > 0) {
                 inflater.inflate(R.menu.menu_conversation_expiration_on, menu)
                 val item = menu.findItem(R.id.menu_expiring_messages)