Enable tunnel testing when in hidden mode (ticket #1192)

Enable tunnel testing when without addresses (ticket #1835)
Use fast peers for inbound tunnels when without addresses (ticket #1835)

router/java/src/net/i2p/data/router/RouterInfo.java

@@ -180,6 +180,16 @@ public class RouterInfo extends DatabaseEntry {
         _published = published;
     }
 
+    /**
+     * Return the number of router addresses.
+     * More efficient than getAddresses().size()
+     *
+     * @since 0.9.27
+     */
+    public int getAddressCount() {
+        return _addresses.size();
+    }
+
     /**
      * Retrieve the set of RouterAddress structures at which this
      * router can be contacted.