Make usage of Arquillian Droidium stack easier

Currently, Droidium consists of 3 thinks:

1/ Container
2/ Native extension
3/ Web extension

User can arbitrary combine these extensions. For that reason, it would be great if container, which is always used, will emit some huge warning in case that it discovers Drone is injected and browser==android and web extension is missing on class path. Similarly, container should be able to figure out that native extension is missing but it will likely be needed - as it has access to @Instrumented deployments.