Continue to pass in --signing_helper for avbtool. am: 0d40e21e

    self.key_passwords = key_passwords

    self.codename_to_api_level_map = codename_to_api_level_map

  def ProcessApexFile(self, apk_keys, payload_key):

  def ProcessApexFile(self, apk_keys, payload_key, signing_args=None):

    """Scans and signs the apk files and repack the apex

    Args:

      logger.info('No apk file has been signed in %s', self.apex_path)

      return self.apex_path

    return self.RepackApexPayload(payload_dir, payload_key)

    return self.RepackApexPayload(payload_dir, payload_key, signing_args)

  def ExtractApexPayloadAndSignApks(self, apk_entries, apk_keys):

    """Extracts the payload image and signs the containing apk files."""

      has_signed_apk = True

    return payload_dir, has_signed_apk

  def RepackApexPayload(self, payload_dir, payload_key):

  def RepackApexPayload(self, payload_dir, payload_key, signing_args=None):

    """Rebuilds the apex file with the updated payload directory."""

    apex_dir = common.MakeTempDir()

    # Extract the apex file and reuse its meta files as repack parameters.

                          os.getenv('PATH')]

    for key, val in arguments_dict.items():

      generate_image_cmd.extend(['--' + key, val])

    # Add quote to the signing_args as we will pass

    # --signing_args "--signing_helper_with_files=%path" to apexer

    if signing_args:

      generate_image_cmd.extend(['--signing_args', '"{}"'.format(signing_args)])

    # optional arguments for apex repacking

    manifest_json = os.path.join(apex_dir, 'apex_manifest.json')

    if os.path.exists(manifest_json):

  # the apex file after signing.

  apk_signer = ApexApkSigner(apex_file, container_pw,

                             codename_to_api_level_map)

  apex_file = apk_signer.ProcessApexFile(apk_keys, payload_key)

  apex_file = apk_signer.ProcessApexFile(apk_keys, payload_key, signing_args)

  # 2a. Extract and sign the APEX_PAYLOAD_IMAGE entry with the given

  # payload_key.