我想通过aab创建Fastlane（捆绑包），但是到目前为止，我只能创建apk，这是我的lane，如何创建aab？

 lane :beta do
    store_password = prompt(text: "Signing Store Password: ",secure_text: true)
    key_password = prompt(text: "Alias Key Password: ",secure_text: true)
    releaseFilePath = File.join(Dir.pwd,"..","my-release-key.keystore")
    gradle(task: 'clean')
    gradle(
      task: 'assemble',build_type: 'Release',print_command: false,properties: {
        "android.injected.signing.store.file" => releaseFilePath,"android.injected.signing.store.password" => store_password,"android.injected.signing.key.alias" => "my-key-alias","android.injected.signing.key.password" => key_password,}
    )
    upload_to_play_store(
      track: 'internal'
    )