static void logWriteError(String host, File file, Throwable t) {
            logger.log(Level.WARNING,
                    "FileClientSessionCache: Error writing session data for " + host + " to " + file
                            + ".",
                    t);
        }
Lazily updates accessOrder to know about all files as opposed to
just the files accessed since this process started.
common/src/main/java/org/conscrypt/FileClientSessionCache.java