Doc change: adding usb docs and removed ADK doc. ADK doc will be in another CL

      <li><a href="<?cs var:toroot?>guide/topics/nfc/index.html">

            <span class="en">Near Field Communication</span></a>

            <span class="new">new!</span></li>

      <li class="toggle-list">

          <div><a href="<?cs var:toroot?>guide/topics/usb/index.html">

            <span class="en">USB</span></a>

            <span class="new">new!</span>

          </div>

            <ul>

              <li><a href="<?cs var:toroot ?>guide/topics/usb/accessory.html">Accessory</a></li>

              <li><a href="<?cs var:toroot ?>guide/topics/usb/host.html">Host</a></li>

            </ul>

          </li>

       <li><a href="<?cs var:toroot?>guide/topics/network/sip.html">

            <span class="en">Session Initiation Protocol</span></a>

            <span class="new">new!</span>

                <a href="<?cs var:toroot ?>guide/topics/testing/what_to_test.html">

                <span class="en">What To Test</span></a>

              </li>

           </ul>

      </li>

    </ul>