VideoToolbox iOS xcode26.0 rc

#VideoToolbox.framework https://github.com/dotnet/macios/pull/23779

diff -ruN /Applications/Xcode_26.0.0-beta7.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/VideoToolbox.framework/Headers/VTErrors.h /Applications/Xcode_26.0.0-rc.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/VideoToolbox.framework/Headers/VTErrors.h
--- /Applications/Xcode_26.0.0-beta7.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/VideoToolbox.framework/Headers/VTErrors.h	2025-08-08 01:08:32
+++ /Applications/Xcode_26.0.0-rc.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/VideoToolbox.framework/Headers/VTErrors.h	2025-08-18 23:07:58
@@ -69,6 +69,7 @@
 	kVTCouldNotOutputTaggedBufferGroupErr	= -17699,
 	kVTCouldNotFindExtensionErr				= -19510,
 	kVTExtensionConflictErr					= -19511,
+	kVTVideoEncoderAutoWhiteBalanceNotLockedErr = -19512,
 };
 
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