Decided against it as I think this hits a `Cursor` call each time.

http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.2.2_r1/android/provider/Settings.java#Settings.NameValueCache.getStringForUser%28android.content.ContentResolver%2Cjava.lang.String%2Cint%29