fix setSpeakerOn has no effect

Author: cloudwebrtc

common/darwin/Classes/AudioUtils.m

@@ -26,6 +26,7 @@ + (void)ensureAudioSessionWithRecording:(BOOL)recording {
     } else if (!recording || (session.category == AVAudioSessionCategoryAmbient
                               || session.category == AVAudioSessionCategorySoloAmbient)) {
         config.category = AVAudioSessionCategoryPlayback;
+        config.categoryOptions = 0;
         config.mode = AVAudioSessionModeDefault;
 
         // upgrade from ambient if needed