docs: fix for bug 5057581

      devices that you want to filter. The following list describes the attributes of

      <code>&lt;usb-device&gt;</code>. In general, use vendor and product ID if you want to filter

      for a specific device and use class, subclass, and protocol if you want to filter for a group

      of USB devices, such as mass storage devices or digital cameras.</p>

      of USB devices, such as mass storage devices or digital cameras. You can specify none or

      all of these attributes. Specifying no attributes matches every USB device, so only do this

      if your application requires it:</p>

      <ul>

        <li><code>vendor-id</code></li>

</pre>

  <p>In this case, the following resource file should be saved in

  <code>res/xml/device_filter.xml</code> and specifies that any USB device with the corresponding

  vendor ID and product ID should be filtered. These IDs are specific to the device and are

  specified by the device's manufacturer:</p>

  <code>res/xml/device_filter.xml</code> and specifies that any USB device with the specified

  attributes should be filtered:</p>

  <pre>

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <usb-device vendor-id="1234" product-id="5678" />

    <usb-device vendor-id="1234" product-id="5678" class="255" subclass="66" protocol="1" />

</resources>

</pre>