Automatically try reloading failed images on network changes (#3170)

* Add the networkMonitor to the NSE and delete the old MockMediaLoader

* Generate a MediaLoaderMock through AutoMockable and use it in the MediaProviderTests

* Implement an ImageProvider mechanism that automatically tries reloading images when connectivity is established again and use it for LoadableImages

* Merge the ImageProvider protocol back into the MediaProvider

* Address PR review comments

* Provide a default sdk client request configuration

* Address tasks not automatically cancelling themselves when views get deallocated

ElementX/Sources/Screens/RoomDirectorySearchScreen/View/RoomDirectorySearchScreen.swift

@@ -25,7 +25,7 @@ struct RoomDirectorySearchScreen: View {
             List {
                 Section {
                     ForEach(context.viewState.rooms) { room in
-                        RoomDirectorySearchCell(result: room, imageProvider: context.imageProvider) {
+                        RoomDirectorySearchCell(result: room, mediaProvider: context.mediaProvider) {
                             context.send(viewAction: .select(room: room))
                         }
                     }
@@ -102,7 +102,7 @@ struct RoomDirectorySearchScreen_Previews: PreviewProvider, TestablePreview {
         
         return RoomDirectorySearchScreenViewModel(clientProxy: clientProxy,
                                                   userIndicatorController: UserIndicatorControllerMock(),
-                                                  imageProvider: MockMediaProvider())
+                                                  mediaProvider: MockMediaProvider())
     }()
     
     static var previews: some View {