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/Settings/NotificationSettingsEditScreen/View/NotificationSettingsEditScreenRoomCell.swift

@@ -41,7 +41,7 @@ struct NotificationSettingsEditScreenRoomCell: View {
         if dynamicTypeSize < .accessibility3 {
             RoomAvatarImage(avatar: room.avatar,
                             avatarSize: .room(on: .notificationSettings),
-                            imageProvider: context.imageProvider)
+                            mediaProvider: context.mediaProvider)
                 .dynamicTypeSize(dynamicTypeSize < .accessibility1 ? dynamicTypeSize : .accessibility1)
                 .accessibilityHidden(true)
         }