odk: add missing modelines

Change-Id: I0bd2d761b5a75681c8c3e53664084dd3b8176107
Reviewed-on: https://gerrit.libreoffice.org/25051
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

odk/examples/DevelopersGuide/Components/JavaComponent/TestJavaComponent.java

@@ -1,3 +1,4 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /*************************************************************************
  *
  *  The Contents of this file are made available subject to the terms of
@@ -139,3 +140,5 @@ public class TestJavaComponent
         System.exit(0);
     }
 }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */