VideoToolbox iOS 14.5 to 15.0 API Differences

Added kVTProfileLevel_H264_ConstrainedBaseline_AutoLevel

Added kVTProfileLevel_H264_ConstrainedHigh_AutoLevel

Added kVTCompressionPropertyKey_BaseLayerBitRateFraction

Added kVTCompressionPropertyKey_SupportsBaseFrameQP

Added kVTEncodeFrameOptionKey_BaseFrameQP

Added kVTCompressionPropertyKey_MaxAllowedFrameQP

Added kVTCompressionPropertyKey_EnableLTR

Added kVTEncodeFrameOptionKey_AcknowledgedLTRTokens

Added kVTEncodeFrameOptionKey_ForceLTRRefresh

Added kVTSampleAttachmentKey_RequireLTRAcknowledgementToken

Added kVTVideoDecoderReferenceMissingErr

Added kVTVideoDecoderCallbackMessagingErr

Added kVTVideoEncoderListOption_IncludeStandardDefinitionDVEncoders