8237078: [macOS] Media build broken on XCode 11

Reviewed-by: kcr, almatvee

Author: Johan Vos

modules/javafx.media/src/main/native/jfxmedia/platform/osx/avf/AVFAudioProcessor.mm

@@ -108,9 +108,7 @@ -(AVAudioMix*) mixer {
                 if (noErr == MTAudioProcessingTapCreate(kCFAllocatorDefault, &callbacks,
                         kMTAudioProcessingTapCreationFlag_PreEffects,
                         &audioProcessingTap)) {
-                    objc_msgSend(audioMixInputParameters,
-                            @selector(setAudioTapProcessor :),
-                            audioProcessingTap);
+                    [audioMixInputParameters setAudioTapProcessor:audioProcessingTap];
 
                     CFRelease(audioProcessingTap); // owned by the mixer now
                     mixer.inputParameters = @[audioMixInputParameters];