CoreMedia tvOS xcode13.1 rc

#CoreMedia.framework https://github.com/xamarin/xamarin-macios/pull/13113

diff -ruN /Applications/Xcode_13.0.0-beta5.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/CoreMedia.framework/Headers/CMFormatDescription.h /Applications/Xcode_13.1.0-rc.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/CoreMedia.framework/Headers/CMFormatDescription.h
--- /Applications/Xcode_13.0.0-beta5.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/CoreMedia.framework/Headers/CMFormatDescription.h	2021-08-07 05:21:44.000000000 -0400
+++ /Applications/Xcode_13.1.0-rc.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/CoreMedia.framework/Headers/CMFormatDescription.h	2021-09-09 16:45:49.000000000 -0400
@@ -641,6 +641,8 @@
 	kCMVideoCodecType_AppleProResRAW   = 'aprn',
 	kCMVideoCodecType_AppleProResRAWHQ = 'aprh',
 
+	kCMVideoCodecType_DisparityHEVC    = 'dish', // encodes kCVPixelFormatType_DisparityFloat16 in 10-bit monochrome HEVC
+	kCMVideoCodecType_DepthHEVC        = 'deph', // encodes kCVPixelFormatType_DepthFloat16 in 10-bit monochrome HEVC
 } API_AVAILABLE(macos(10.7), ios(4.0), tvos(9.0), watchos(6.0));
 
 /*!