Expose devices in Device Controls.

[RokeJulianLockhart]

[herzhenr]

This would be a cool feature but similar to Issue #2 this would require native android code to implement. I think in the android developer guide Control external devices it is explained how this can be achieved and this doesn't seem too complicated. I primarily use the app on iOS so I like to implement features the most which iOS and android user can benefit both but this seems to be a very cool feature for android so I will put it on my agenda!