amp-bind fails to upgrade in Friendly Iframe #9395
Description
When amp-bind is used in an A4A ad, it fails when ad is rendered in FIE, works in 3p.
in FIE case, error is:
amp-ads.firebaseapp.com/dist/amp.js:12415 Uncaught (in promise) Error: amp-bind is not upgraded yet
at Log.assert (amp-ads.firebaseapp.com/dist/amp.js:12415)
at Object.upgradeElementInChildWindow (amp-ads.firebaseapp.com/dist/amp.js:5495)
at amp-ads.firebaseapp.com/dist/amp.js:19105
at <anonymous>
/cc @choumx @dvoytenko