Decode GPS navigation message - parseHwNavigationMessageUpdates() (from https://github.com/google/gps-measurement-tools/blob/063e2275e29de1f5476f2a9a9e0cb900a37d0b68/GNSSLogger/pseudorange/src/main/java/com/google/location/lbs/gnss/gps/pseudorange/PseudorangePositionVelocityFromRealTimeEvents.java#L432)

parseHwNavigationMessageUpdates.java

  /**
   * Parses a string array containing an updates to the navigation message and return the most
   * recent {@link GpsNavMessageProto}.
   */
  public void parseHwNavigationMessageUpdates(GnssNavigationMessage navigationMessage) {
    byte messagePrn = (byte) navigationMessage.getSvid();
    byte messageType = (byte) (navigationMessage.getType() >> 8);
    int subMessageId = navigationMessage.getSubmessageId();

    byte[] messageRawData = navigationMessage.getData();
    // parse only GPS navigation messages for now
    if (messageType == 1) {
      mGpsNavigationMessageStore.onNavMessageReported(
          messagePrn, messageType, (short) subMessageId, messageRawData);
      mHardwareGpsNavMessageProto = mGpsNavigationMessageStore.createDecodedNavMessage();
    }
  }