title: "URL not defined in the manifest" when running Instant App that uses @string for host name
body: <p>Seeing issue running Instant App in Android Studio when <code>@string</code> value is used for host name (getting "URL not defined in the manifest"  error).  For example:   </p>
  
  <pre><code>&lt;data android:scheme="https" android:host="@string/SOME_DOMAIN" /&gt;
  </code></pre>
  
  <p>This is working fine if <code>android:host</code> is set to raw domain string.  I can work around this by setting that value to specific domain value when running/debugging from AS but not ideal (always danger of pushing code that contains the hard coded string!)</p>
  
  <p>Also, this works fine if I build/deploy base and feature apks from command line and trigger using something like <code>adb shell am start -W -a android.intent.action.VIEW -d "&lt;my url&gt;"</code></p>