Cleanup how we setup the CallKit provider and have it be used for outgoing calls as well (#2967)

- tear down ElementCall screens when ending the call from the CXCallController
- make the call UI available in the task manager and lock screen
- Fix broken hang up widget message format

ElementX/Sources/Screens/CallScreen/CallScreenViewModel.swift

@@ -102,7 +102,7 @@ class CallScreenViewModel: CallScreenViewModelType, CallScreenViewModelProtocol
                 return
             }
             
-            await elementCallService.setupCallSession(title: roomProxy.roomTitle)
+            await elementCallService.setupCallSession(roomID: roomProxy.id, roomDisplayName: roomProxy.roomTitle)
             
             let _ = await roomProxy.sendCallNotificationIfNeeeded()
         }
@@ -128,15 +128,15 @@ class CallScreenViewModel: CallScreenViewModelType, CallScreenViewModelProtocol
     
     private func hangUp() async {
         let hangUpMessage = """
-        "api":"toWidget",
+        {"api":"fromWidget",
         "widgetId":"\(widgetDriver.widgetID)",
         "requestId":"widgetapi-\(UUID())",
         "action":"im.vector.hangup",
-        "data":{}
+        "data":{}}
         """
         
         let result = await widgetDriver.sendMessage(hangUpMessage)
-        MXLog.error("Result yo: \(result)")
+        MXLog.info("Sent hangUp message with result: \(result)")
     }
 
     private static let eventHandlerName = "elementx"

ElementX/Sources/Screens/CallScreen/View/CallScreen.swift

@@ -181,7 +181,7 @@ struct CallScreen_Previews: PreviewProvider {
         
         roomProxy.elementCallWidgetDriverReturnValue = widgetDriver
         
-        return CallScreenViewModel(elementCallService: ElementCallServiceMock(),
+        return CallScreenViewModel(elementCallService: ElementCallServiceMock(.init()),
                                    roomProxy: roomProxy,
                                    callBaseURL: "https://call.element.io",
                                    clientID: "io.element.elementx")