Changes to Create a new Custom Tab

added the new CHROMEOS enum value to the items/items/content/advancedSettings/nodeClass/items response property for the response status 200

added the new HEALTH_STATUS enum value to the items/items/attributeType response property for the response status 200

added the new INPUT_FIELD_FORM enum value to the items/items/entityType response property for the response status 200

added the optional property items/items/content/advancedSettings/healthStatus to the response with the 200 status

added the optional property items/items/content/advancedSettings/maxWysiwygHtmlCharacters to the response with the 200 status

added the new AOSP enum value to the items/items/content/advancedSettings/nodeClass/items response property for the response status 200

added the new GLOBAL enum value to the entityType response property for the response status 200

added the new GLOBAL enum value to the items/items/definitionScope/items response property for the response status 200

added the new ROLE_BASED enum value to the items/items/technicianPermission response property for the response status 200

added the new GLOBAL enum value to the request property entityType