Bug 1040924 - Ee-enable the serviceworker tests on non-Windows, r=RyanVM

dom/workers/test/serviceworkers/mochitest.ini

@@ -1,5 +1,5 @@
 [DEFAULT]
-run-if = os == "win" # Bug 1040924 - Failure prone on !Windows
+skip-if = buildapp == 'b2g' || android_version == "10" # bug 1056702
 support-files =
   worker.js
   worker2.js