[CoreImage] Add new properties to a few filter protocols.

Fixes these compiler errors:

    .libs/Microsoft.iOS.registrar.armv7.m:14623:17: error: auto property synthesis will not synthesize property 'padding' declared in protocol 'CIAttributedTextImageGenerator' [-Werror,-Wobjc-protocol-property-synthesis]
    @implementation CoreImage_CIAttributedTextImageGenerator {
                    ^
    /Applications/Xcode_14.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.0.sdk/System/Library/Frameworks/CoreImage.framework/Headers/CIFilterBuiltins.h:653:31: note: property declared here
      @property (nonatomic) float padding  NS_AVAILABLE(13_0, 16_0);
                                  ^
    .libs/Microsoft.iOS.registrar.armv7.m:14679:1: note: add a '@synthesize' directive
    @end
    ^
    .libs/Microsoft.iOS.registrar.armv7.m:17377:17: error: auto property synthesis will not synthesize property 'extrapolate' declared in protocol 'CIColorCube' [-Werror,-Wobjc-protocol-property-synthesis]
    @implementation CoreImage_CIColorCube {
                    ^
    /Applications/Xcode_14.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.0.sdk/System/Library/Frameworks/CoreImage.framework/Headers/CIFilterBuiltins.h:335:30: note: property declared here
      @property (nonatomic) bool extrapolate NS_AVAILABLE(13_0, 16_0);
                                 ^
    .libs/Microsoft.iOS.registrar.armv7.m:17489:1: note: add a '@synthesize' directive
    @end
    ^
    .libs/Microsoft.iOS.registrar.armv7.m:17491:17: error: auto property synthesis will not synthesize property 'extrapolate' declared in protocol 'CIColorCubesMixedWithMask' [-Werror,-Wobjc-protocol-property-synthesis]
    @implementation CoreImage_CIColorCubesMixedWithMask {
                    ^
    /Applications/Xcode_14.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.0.sdk/System/Library/Frameworks/CoreImage.framework/Headers/CIFilterBuiltins.h:344:30: note: property declared here
      @property (nonatomic) bool extrapolate NS_AVAILABLE(13_0, 16_0);
                                 ^
    .libs/Microsoft.iOS.registrar.armv7.m:17639:1: note: add a '@synthesize' directive
    @end
    ^
    .libs/Microsoft.iOS.registrar.armv7.m:32962:17: error: auto property synthesis will not synthesize property 'padding' declared in protocol 'CITextImageGenerator' [-Werror,-Wobjc-protocol-property-synthesis]
    @implementation CoreImage_CITextImageGenerator {
                    ^
    /Applications/Xcode_14.0.0-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS16.0.sdk/System/Library/Frameworks/CoreImage.framework/Headers/CIFilterBuiltins.h:747:31: note: property declared here
      @property (nonatomic) float padding  NS_AVAILABLE(13_0, 16_0);
                                  ^
    .libs/Microsoft.iOS.registrar.armv7.m:33042:1: note: add a '@synthesize' directive
    @end
    ^
    4 errors generated.
    make: *** [.libs/Microsoft.iOS.registrar.armv7.a] Error 1

src/coreimage.cs

@@ -6565,6 +6565,13 @@ namespace CoreImage {
 		[Abstract]
 		[Export ("scaleFactor")]
 		float ScaleFactor { get; set; }
+
+		[iOS (16,0)]
+		[TV (16,0)]
+		[Mac (13,0)]
+		[Abstract]
+		[Export ("padding")]
+		float Padding { get; set; }
 	}
 
 	[iOS (13,0)]
@@ -6923,6 +6930,13 @@ namespace CoreImage {
 		[Abstract]
 		[Export ("cubeData", ArgumentSemantic.Retain)]
 		NSData CubeData { get; set; }
+
+		[iOS (16,0)]
+		[TV (16,0)]
+		[Mac (13,0)]
+		[Abstract]
+		[Export ("extrapolate")]
+		bool Extrapolate { get; set; }
 	}
 
 	[iOS (13,0)]
@@ -6954,6 +6968,13 @@ namespace CoreImage {
 		[Abstract]
 		[NullAllowed, Export ("colorSpace", ArgumentSemantic.Assign)]
 		CGColorSpace ColorSpace { get; set; }
+
+		[iOS (16,0)]
+		[TV (16,0)]
+		[Mac (13,0)]
+		[Abstract]
+		[Export ("extrapolate")]
+		bool Extrapolate { get; set; }
 	}
 
 	[iOS (13,0)]
@@ -9195,6 +9216,13 @@ namespace CoreImage {
 		[Abstract]
 		[Export ("scaleFactor")]
 		float ScaleFactor { get; set; }
+
+		[iOS (16,0)]
+		[TV (16,0)]
+		[Mac (13,0)]
+		[Abstract]
+		[Export ("padding")]
+		float Padding { get; set; }
 	}
 
 	[iOS (13,0)]