Cory,
Customer support is correct, it's no longer possible to set RSID or tracking server programmatically in any of the 4.x libraries. We have moved to a configuration file to support a variety of upcoming enhancements (including post-release configuration changes, points of interest updates, and a few other tasty features we're not able to talk about yet).
I can totally understand how this can be frustrating initially -- especially if you're used to the previous way the libraries worked -- but we feel that programmatic configuration can lead to bigger issues with releases (and to poor development practices). The ability to configure your app for different modes (test/dev/qe/release) is better handled using one of the methodologies below:
Android - Use a build configuration tool like Maven or Gradle to inject the proper config file for the given build at compile time.
iOS/OSX - Use a separate target for each build type, and only include the proper config file in each target.
BlackBerry10 - Set your config file on a per-release-basis in the bar-descriptor.xml file for your application.
Similar methodologies can be used for other platforms (specifically WinRT/Windows Phone), and we'll provide documentation around those platforms when we provide the 4.x versions.
Regards,
Peter Fransen
Adobe Marketing Cloud - Mobile Engineering Team Lead