title: Facebook App Link wrong behaviour with al:web:should_fallback on Android
body: <p>I have a web page in place with proper App Links tags; the relevant ones for the Android part are:</p>
  
  <pre><code>&lt;meta property="al:android:url" content="custom-scheme://some/url/with?q=1&amp;s=2"&gt;
  &lt;meta property="al:android:package" content="com.example.app"&gt;
  &lt;meta property="al:android:app_name" content="Example App"&gt;
  &lt;meta property="al:web:should_fallback" content="false"&gt;
  </code></pre>
  
  <p>Sharing content from the Android application, by posting on Facebook a link to a web page containing those tags, just works. However, when I click on the post from the native Facebook application, my Android application receives an Intent with a <code>data</code> property set to the original shared link instead to the app link specified in the <code>al:android:url</code> metadata.</p>
  
  <p>I expected that, having set the <code>al:web:should_fallback</code> metadata to <code>false</code>, the original URL would not be shown, and the defined app link would be picked. But the only difference I see in the Intent is on its action: instead of being a regular <code>android.intent.action.VIEW</code>, it is some weird <code>com.facebook.application.720295239734539</code>.</p>
  
  <p>Which is the right metadata combination to have Facebook correctly using the custom-schemed URL I defined in <code>al:android:url</code> as the deep link carried by Intent's <code>data</code> to my app?</p>