Silence a couple more deprecation warnings.

Author: pixlwave

ElementX/Sources/Services/Media/MediaUploadingPreprocessor.swift

@@ -396,7 +396,7 @@ struct MediaUploadingPreprocessor {
     /// - Parameter url: the video URL
     /// - Returns: the URL for the resulting thumbnail and its sizing info as an `ImageProcessingResult`
     private func generateThumbnailForVideoAt(_ url: URL) async throws(MediaUploadingPreprocessorError) -> ImageProcessingInfo {
-        let assetImageGenerator = AVAssetImageGenerator(asset: AVAsset(url: url))
+        let assetImageGenerator = AVAssetImageGenerator(asset: AVURLAsset(url: url))
         assetImageGenerator.appliesPreferredTrackTransform = true
         assetImageGenerator.maximumSize = Constants.maximumThumbnailSize
 

ElementX/Sources/UITests/UITestsSignalling.swift

@@ -94,7 +94,7 @@ enum UITestsSignalling {
                 try rawMessage(.ready).write(to: fileURL, atomically: false, encoding: .utf8)
             case .app:
                 // The app client is started second and checks that there is a ready signal from the tests.
-                guard try String(contentsOf: fileURL) == Message(mode: .tests, signal: .ready).rawValue else { throw UITestsSignalError.testsClientNotReady }
+                guard try String(contentsOf: fileURL, encoding: .utf8) == Message(mode: .tests, signal: .ready).rawValue else { throw UITestsSignalError.testsClientNotReady }
                 isConnected = true
                 // The app client then echoes back to the tests that it is now ready.
                 try send(.ready)