title: How to add a new feature (Android Bluetooth LE) but also still build with minimum API?
body: <p>I have added Bluetooth LE as a new feature on my app, however Bluetooth LE was added in API level 18, my app can work without LE support so I want my minimum API level to be set at 13, and then at runtime (or through a separate compilation process) want to check if the current device has a high enough API level to enable the LE functionality</p>
  
  <p>Is there a process or a best design usage for this?</p>