Bug 1687789 - add fail-if condition on a11y_checks for browser_net_statistics-02.js. r=jmaher

Depends on D102472

Differential Revision: https://phabricator.services.mozilla.com/D102473

devtools/client/netmonitor/test/browser.ini

@@ -231,6 +231,7 @@ skip-if = true #Bug 1667115
 [browser_net_statistics-01.js]
 skip-if = true # Bug 1373558
 [browser_net_statistics-02.js]
+fail-if = a11y_checks # bug 1687789 interactive char is not accessible
 [browser_net_status-bar-transferred-size.js]
 [browser_net_status-bar.js]
 [browser_net_status-codes.js]