Revert "
Bug 1977690 - Remove unused AppRequestInterceptor in androidTests r=aaronmt" for causing fenix-debug failures.
This reverts commit bc9dc5f4296482e17560627acaacd2797e462211.
<!doctype html>
<html class="reftest-wait">
<head>
<title>Bug 1239889</title>
</head>
<body>
</body>
<script>
var div = document.createElement('div');
var effect = new KeyframeEffect(div, { opacity: [0, 1] });
requestAnimationFrame(() => {
document.body.appendChild(div);
document.documentElement.classList.remove("reftest-wait");
});
</script>
</html>