Country code XK also doesn't have a country name on JB

BUG=404831

Review-Url: https://codereview.chromium.org/2326013002
Cr-Commit-Position: refs/heads/master@{#417577}

components/autofill/core/browser/autofill_country_unittest.cc

@@ -60,6 +60,7 @@ TEST(AutofillCountryTest, AllCountryCodesHaveCountryName) {
       base::android::SDK_VERSION_KITKAT) {
     expected_failures.insert("BQ");
     expected_failures.insert("SS");
+    expected_failures.insert("XK");
   }
 #endif
   const std::vector<std::string>& country_codes =