AVFoundation tvOS xcode15.4 b1

#AVFoundation.framework https://github.com/xamarin/xamarin-macios/pull/20846

diff -ruN /Applications/Xcode_15.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVPlayerItem.h /Applications/Xcode_15.4.0-beta.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVPlayerItem.h
--- /Applications/Xcode_15.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVPlayerItem.h	2024-02-15 00:47:37
+++ /Applications/Xcode_15.4.0-beta.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVPlayerItem.h	2024-04-08 00:29:05
@@ -1336,6 +1336,13 @@
  */
 @property (nonatomic, readonly, nullable) NSString *errorComment;
 
+ /*
+ @property		allHTTPResponseHeaderFields
+ @abstract		The HTTP header fields returned by the server, if an HTTP response was received as part of this error.
+ @discussion	See -[NSHTTPURLResponse allHeaderFields] for more information.
+ */
+ @property (nonatomic, readonly, nullable) NSDictionary <NSString *, NSString *> *allHTTPResponseHeaderFields API_AVAILABLE(macos(14.2), ios(17.2), tvos(17.2), watchos(10.2));
+
 @end
 
 NS_ASSUME_NONNULL_END