add pii support for Rlog

        return Log.isLoggable(tag, level);

    }

    /**

     * Redact personally identifiable information for production users.

     * If log tag is loggable in verbose mode, return the original string, otherwise return XXX.

     */

    public static String pii(String tag, Object pii) {

        return (isLoggable(tag, Log.VERBOSE) ? String.valueOf(pii) : "XXX");

    }

}