iOS | Add --directories-to-pull

[bootstraponline]

Author the user story for this feature

As an iOS developer, I want to pull directories so I can store results in Google cloud storage.

Describe the solution

This is an unpublished feature at the moment.

  /**
   * List of directories on the device to upload to Cloud Storage at the end of the test.
   * Directories should either be in a shared directory (e.g. /private/var/mobile/Media) or within
   * an accessible directory inside the app's filesystem (e.g. /Documents) by specifying the bundle
   * id.
   * @param pullDirectories pullDirectories or {@code null} for none
   */
  public IosTestSetup setPullDirectories(java.util.List<IosDeviceFile> pullDirectories) {
    this.pullDirectories = pullDirectories;
    return this;
  }

https://cloud.google.com/sdk/gcloud/reference/alpha/firebase/test/ios/run