Revert "Bug 1977690 - Remove unused AppRequestInterceptor in androidTests r=aaronmt" for causing fenix-debug failures.
This reverts commit bc9dc5f4296482e17560627acaacd2797e462211.
<html><head><title>Crash TR.cells = null</title><scriptlanguage="javascript">functioncrashme(){varelm=document.createElement('tr');elm.cells=null;}</script></head><bodyonload="crashme()"><p>This test case creates a TR element then tries to assign to the cells property</p><p>Crash</p></body></html>