Changes to Prepare a Google Drive session for host file transport

the response's body type changed from object to no type for status 400

removed the required property details from the response with the 400 status

removed the required property error from the response with the 400 status

removed the optional property capability from the response with the 400 status

removed the optional property message from the response with the 400 status

added the new optional request property baseRevision

added the new optional request property convertTo

added the new optional request property fileId

added InvalidRequestError subschema #2 to the response body anyOf list for the response status 400

added the optional property currentRevision to the response with the 409 status

added the optional property modifiedTime to the response with the 409 status

added the optional property replaces to the response with the 200 status

removed the non-success response with the status 404

endpoint added