Changes to List policies, optionally filtered by policy type.

the query request parameter type became optional

added the new optional query request parameter count

added the new optional query request parameter offset

the items response's property type changed from no type to object for status 200 (media type: application/vnd.aws-cdf-v1.0+json)

the items response's property type changed from no type to object for status 200 (media type: application/vnd.aws-cdf-v2.0+json)

the items/policies/items response's property type changed from no type to object for status 200 (media type: application/vnd.aws-cdf-v1.0+json)

the items/policies/items response's property type changed from no type to object for status 200 (media type: application/vnd.aws-cdf-v2.0+json)