[flexiglass] Clear session storage if we are idle on Gone scene

    private fun resetShadeSessions() {

        applicationScope.launch {

            combine(

                    sceneBackInteractor.backStack

                        // We are in a session if either Shade or QuickSettings is on the back stack

                        .map { backStack ->

                    backStack.asIterable().any { it == Scenes.Shade || it == Scenes.QuickSettings }

                            backStack.asIterable().any {

                                it == Scenes.Shade || it == Scenes.QuickSettings

                            }

                        }

                        .distinctUntilChanged(),

                    sceneInteractor.transitionState

                        .mapNotNull { state ->

                            // We are also in a session if either Shade or QuickSettings is the

                            // current scene

                            when (state) {

                                is ObservableTransitionState.Idle -> state.currentScene

                                is ObservableTransitionState.Transition -> state.fromScene

                            }.let { it == Scenes.Shade || it == Scenes.QuickSettings }

                        }

                        .distinctUntilChanged()

                ) { inBackStack, isCurrentScene ->

                    inBackStack || isCurrentScene

                }

                // Once a session has ended, clear the session storage.

                .filter { inSession -> !inSession }

                .collect { shadeSessionStorage.clear() }