Merge "docs: M Preview - update the preview section TOC" into mnc-preview-docs

  </li>

  <li class="nav-section">

    <div class="nav-section-header empty"><a href="<?cs var:toroot ?>preview/api-overview.html">

      API Overview</a></div>

  </li>

  <li class="nav-section">

    <div class="nav-section-header empty"><a href="<?cs var:toroot ?>preview/api-changes.html">

      Behavior Changes</a></div>

  </li>

  <li class="nav-section">

    <div class="nav-section-header empty">

    <a href="<?cs var:toroot ?>preview/features/runtime-permissions.html">

      Runtime Permissions</a></div>

    <div class="nav-section-header"><a href="<?cs var:toroot ?>preview/testing/guide.html">

      Testing Guide</a></div>

      <ul>

        <li><a href="<?cs var:toroot ?>preview/testing/performance.html">

          Performance Testing</a></li>

      </ul>

  </li>

  <li class="nav-section">

    <div class="nav-section-header empty">

    <a href="<?cs var:toroot ?>preview/backup/index.html">

      Automatic Backups</a></div>

    <div class="nav-section-header"><a href="<?cs var:toroot ?>preview/api-overview.html">

      API Overview</a></div>

      <ul>

        <li><a href="<?cs var:toroot ?>preview/features/runtime-permissions.html">

          Runtime Permissions</a></li>

        <li><a href="<?cs var:toroot ?>preview/features/app-linking.html">

          App Linking</a></li>

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

          Automatic Backups</a></li>

      </ul>

  </li>

  <li class="nav-section">

    <div class="nav-section-header empty">

    <a href="<?cs var:toroot ?>preview/data-binding/guide.html">

      Data Binding</a></div>

    <div class="nav-section-header empty"><a href="<?cs var:toroot ?>preview/api-changes.html">

      Behavior Changes</a></div>

  </li>

  <li class="nav-section">