docs: Fixed bad link to cloud-backup training class

  to: /training/implementing-navigation/lateral.html

- from: /training/cloudsync/aesync.html

  to: /google/gcm/index.html

- from: /training/cloudsync/index.html

  to: /training/backup/index.html

- from: /training/basics/location/

  to: /training/location/

- from: /training/monetization/index.html

  <div class="col-12">

    <h3>Training</h3>

    <a href="http://developer.android.com/training/cloudsync/index.html">

      <h4>Syncing to the Cloud</h4>

      <p>This class covers different strategies for cloud enabled applications. It covers syncing

data with the cloud using your own back-end web application, and backing up data using the cloud so

that users can restore their data when installing your application on a new device.</p>

    <a href="{@docRoot}training/backup/index.html">

      <h4>Backing up App Data to the Cloud</h4>

      <p>

        This class covers techniques for backing up data to the cloud so that

        users can restore their data when recovering from a data loss (such as a

        factory reset) or installing your application on a new device.

      </p>

    </a>

  </div>

             description=

             "How to sync and back up app and user data to remote web services in the

              cloud and how to restore the data back to multiple devices."

            >Syncing to the Cloud</a>

            >Backing up App Data to the Cloud</a>

        </div>

        <ul>

          <li><a href="<?cs var:toroot ?>training/backup/autosyncapi.html">

      path: /training/efficient-downloads/redundant_redundant.html

    - title: Modifying Patterns Based on the Connectivity Type

      path: /training/efficient-downloads/connectivity_patterns.html

  - title: Syncing to the Cloud

  - title: Backing up App Data to the Cloud

    path: /training/backup/index.html

    path_attributes:

    - name: description

page.title=Using the Backup API

parent.title=Syncing to the Cloud

parent.title=Backing up App Data to the Cloud

parent.link=index.html

trainingnavtop=true