Fix state machine crashes & background tasks (#343)

* Fix `UIApplication.shared` after moving to SwiftUI app

* Do not autoplay videos on background

* Move app state changes into the app coordinator

* Add application background task, move into the suspended state more accurately

* Add changelog

* Fix most of the linter errors

* Strip suspended state from state machine

* Fix build

* Clear audio session warning

* Update AppCoordinator.swift

* Update AppCoordinator.swift

* Swift format

ElementX/Sources/Screens/Other/ActivityCoordinator.swift

@@ -20,7 +20,7 @@ struct ActivityCoordinator: CoordinatorProtocol {
     let items: [Any]
     
     func toPresentable() -> AnyView {
-        return AnyView(UIActivityViewControllerWrapper(activityItems: items)
+        AnyView(UIActivityViewControllerWrapper(activityItems: items)
             .presentationDetents([.medium])
             .ignoresSafeArea())
     }

ElementX/Sources/Screens/VideoPlayer/VideoPlayerCoordinator.swift

@@ -36,6 +36,7 @@ final class VideoPlayerCoordinator: CoordinatorProtocol {
         self.parameters = parameters
         
         viewModel = VideoPlayerViewModel(videoURL: parameters.videoURL,
+                                         autoplay: UIApplication.shared.applicationState == .active,
                                          isModallyPresented: parameters.isModallyPresented)
     }
     
@@ -67,8 +68,7 @@ final class VideoPlayerCoordinator: CoordinatorProtocol {
     private func configureAudioSession(_ session: AVAudioSession) {
         do {
             try session.setCategory(.playback,
-                                    mode: .default,
-                                    options: [.allowBluetooth, .allowBluetoothA2DP])
+                                    mode: .default)
             try session.setActive(true)
         } catch {
             MXLog.debug("Configure audio session failed: \(error)")