The system settings permission is going away and the user will be able to choose which apps have access to system settings in the UI. So, if an app is white-listed by the user or being on the system image, we allow access to system settings. Also if the caller has the stronger write secure settings permission we allow changes of the less sensitive system settings. Change-Id: I7aca958fd0ad2c588117b8c6e44d78eb16d648bc