ExposureNotification tvOS 13.4 to 14.0 API Differences

ENCommon.h
Added #def EN_FEATURE_GENERAL
Added #def EN_API_AVAILABLE
Added #def EN_API_AVAILABLE_V2
Added #def EN_API_AVAILABLE_EXPORT
Added #def EN_API_AVAILABLE_EXPORT_V2
Added ENErrorCode
Added ENAuthorizationStatus
Added ENCalibrationConfidence
Added ENDiagnosisReportType
Added ENInfectiousness
ENManager.h
Added ENStatus