UseCase dependencies

I thought UseCases shouldn't have any framework dependencies but [PlayMovie](https://github.com/android10/Android-CleanArchitecture-Kotlin/blob/master/app/src/main/kotlin/com/fernandocejas/sample/features/movies/PlayMovie.kt) has a [Context](https://developer.android.com/reference/android/content/Context) in it and a [Navigator](https://github.com/android10/Android-CleanArchitecture-Kotlin/blob/master/app/src/main/kotlin/com/fernandocejas/sample/core/navigation/Navigator.kt) which contains android specific code. I'm a little bit confused, am I missing something?