Bug 1556667 - disabled testSessionFilePreservation on Android 4.3 r=aryx

Differential Revision: https://phabricator.services.mozilla.com/D33627

--HG--
extra : moz-landing-system : lando

mobile/android/tests/browser/robocop/robocop.ini

@@ -87,6 +87,8 @@ skip-if = android_version == "18"
 # disabled on 4.3, bug 1145867
 skip-if = android_version == "18"
 [src/org/mozilla/gecko/tests/testSessionFilePreservation.java]
+# disabled on 4.3, bug 1556667
+skip-if = android_version == "18"
 [src/org/mozilla/gecko/tests/testSessionOOMSave.java]
 [src/org/mozilla/gecko/tests/testSessionOOMRestore.java]
 [src/org/mozilla/gecko/tests/testSessionPrivateBrowsing.java]