Four new response fields across two Billing API endpoints

Changed

• New plan_zoom_video_management and plan_zoom_video_management_cloud_recording response fields in this Billing API:
  • GET /v2/accounts/{accountId}/plans/usage
• New plan_zva_voice and plan_zva_chat response fields in these Billing APIs:
  • GET /v2/accounts/{accountId}/plans/usage
  • GET /v2/accounts/{accountId}/plans