private OutputStream getUrandomOutputStream() throws IOException {
      synchronized (sLock) {
        if (sUrandomOut == null) {
          sUrandomOut = new FileOutputStream(URANDOM_FILE);
        }
        return sUrandomOut;
      }
    }
Whether this engine instance has been seeded. This is needed because
each instance needs to seed itself if the client does not explicitly
seed it.
java/com/google/android/apps/authenticator/util/PrngFixes.java