title: Add query parameters to link in firebase dynamic link
body: <p>I create dynamic link and I want to send some specific parameter, like:
  "<a href="https://mydynamiclink/?link=" rel="nofollow noreferrer">https://mydynamiclink/?link=</a>" + link + "&amp;msgid=" + id + "&amp;apn=myapn".
  <code>link</code> field looks like "<a href="https://play.google.com/store/apps/details/?id=com.myApp&amp;msgid=myId&amp;apn=myapn" rel="nofollow noreferrer">https://play.google.com/store/apps/details/?id=com.myApp&amp;msgid=myId&amp;apn=myapn</a>"</p>
  
  <p>When I open my app after taping on this link - I receive <code>PendingDynamicLinkData</code> and can get link from it, but not some custom data. (<code>pendingDynamicLinkData.getLink()</code> returns my link without "&amp;msgid=..." - I'm getting string "<a href="https://play.google.com/store/apps/details/?id=com.myApp" rel="nofollow noreferrer">https://play.google.com/store/apps/details/?id=com.myApp</a>")</p>
  
  <p>How can I add my msgid field and get it after all?</p>