Revert "Bug 1977690 - Remove unused AppRequestInterceptor in androidTests r=aaronmt" for causing fenix-debug failures. This reverts commit bc9dc5f4296482e17560627acaacd2797e462211.

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−<div id=target><script>
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−  var player = target.animate([{background: 'green'}, {background: 'green'}]);
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−</script>