LayoutLib: support for custom styles.

        // resolve the defStyleAttr value into a IStyleResourceValue

        IStyleResourceValue defStyleValues = null;

        if (defStyleAttr != 0) {

        // look for a custom style.

        String customStyle = parser.getAttributeValue(null /* namespace*/, "style");

        if (customStyle != null) {

            IResourceValue item = findResValue(customStyle);

            if (item instanceof IStyleResourceValue) {

                defStyleValues = (IStyleResourceValue)item;

            }

        }

        if (defStyleValues == null && defStyleAttr != 0) {

            // get the name from the int.

            String defStyleName = searchAttr(defStyleAttr);