Bug 1667998 - skip some accessible related browser-chrome tests when running a11y-checks. r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D100841

accessible/tests/browser/browser.ini

@@ -1,5 +1,5 @@
 [DEFAULT]
-skip-if = (os == 'win' && processor == 'aarch64') # 1534855
+skip-if = a11y_checks || (os == 'win' && processor == 'aarch64') # 1534855
 support-files =
   !/accessible/tests/mochitest/*.js
   *.jsm

accessible/tests/browser/general/browser.ini

@@ -3,6 +3,7 @@ support-files =
   !/accessible/tests/browser/shared-head.js
   head.js
   !/accessible/tests/mochitest/*.js
-skip-if = (os == 'win' && processor == 'aarch64') # windows-aarch64, 1534811
+skip-if = a11y_checks || (os == 'win' && processor == 'aarch64') # windows-aarch64, 1534811
+
 [browser_test_doc_creation.js]
 [browser_test_urlbar.js]