Bug 1039925 - Fix tests as a follow-up to Bug 822820. r=trivial

mobile/android/base/tests/StringHelper.java

@@ -10,8 +10,8 @@ public class StringHelper {
     };
     public static final String[] DEFAULT_BOOKMARKS_URLS = new String[] {
         "about:firefox",
-        "https://support.mozilla.org/en-US/products/mobile",
-        "https://addons.mozilla.org/en-US/android/"
+        "https://support.mozilla.org/products/mobile",
+        "https://addons.mozilla.org/android/"
     };
     public static final int DEFAULT_BOOKMARKS_COUNT = DEFAULT_BOOKMARKS_TITLES.length;