fix(iOS) fix missing headers

ios/sdk/src/JitsiAudioSession+Private.h

  */
 
 #import "JitsiAudioSession.h"
+#import <WebRTC/WebRTC.h>
 
 @interface JitsiAudioSession (Private)
 

ios/sdk/src/JitsiAudioSession.m

 
 #import "JitsiAudioSession.h"
 #import "JitsiAudioSession+Private.h"
-#import <WebRTC/WebRTC.h>
 
 @implementation JitsiAudioSession