Make Fotoapparat lifecycleaware

[robyka400]

I think it would make sense to make Fotoapparat lifecycle-aware.
The following dependencies could be added:
lifecycle-common-java8
lifecycle-extensions to gradle.

Then the Fotoapparat could receive an additional lifecycleOwner: Lifecycleowner constructor parameter and implement LifecycleEventObserver. This way the Fotoapparat could handle itself lifecycle changes, without the need to override onStart/onPause