Use the maxUploadSize in the media upload screen. (#4359)

* Fix a bug where some files sizes were sent as 0.

* Make FileManger.sizeForItem(at:) a UInt.

The docs specifically say that FileAttributeKey.size returns an unsigned long long so I have no idea why we were returning a Double here…

* Add the maxMediaUploadSize property on ClientProxy.

* Use the maxUploadSize to set a target video size and to show a file too big error.

* Refactor media upload parameter order.

ElementX/Sources/Screens/RoomDetailsEditScreen/RoomDetailsEditScreenCoordinator.swift

@@ -10,6 +10,7 @@ import SwiftUI
 
 struct RoomDetailsEditScreenCoordinatorParameters {
     let roomProxy: JoinedRoomProxyProtocol
+    let clientProxy: ClientProxyProtocol
     let mediaProvider: MediaProviderProtocol
     let mediaUploadingPreprocessor: MediaUploadingPreprocessor
     weak var navigationStackCoordinator: NavigationStackCoordinator?
@@ -35,6 +36,7 @@ final class RoomDetailsEditScreenCoordinator: CoordinatorProtocol {
         self.parameters = parameters
         
         viewModel = RoomDetailsEditScreenViewModel(roomProxy: parameters.roomProxy,
+                                                   clientProxy: parameters.clientProxy,
                                                    mediaProvider: parameters.mediaProvider,
                                                    mediaUploadingPreprocessor: parameters.mediaUploadingPreprocessor,
                                                    userIndicatorController: parameters.userIndicatorController)