Google added a new ART runtime with Android 4.4. How can I determine whether ART or Dalvik is the current runtime?
I think you should be able to use System.getProperty with java.vm.name as the key. In the JavaDoc its value is Dalvik, which let's hope it is Art or ART when using that runtime. It's worth a try...
java.vm.name
Dalvik
Art
ART