Using context.getString for getting formatted strings, as it works better with different locales

Change-Id: I9639bb11197e656c5cdd3a4d63f913edcc0987cb

src/com/android/launcher3/Workspace.java

@@ -4382,7 +4382,7 @@ public class Workspace extends PagedView
 
     private String getPageDescription(int page) {
         int delta = numCustomPages();
-        return String.format(getContext().getString(R.string.workspace_scroll_format),
+        return getContext().getString(R.string.workspace_scroll_format,
                 page + 1 - delta, getChildCount() - delta);
     }