>when the design team of Google hiring are not made up of HR personnel, it could be construed as a violation of Federal labor law.

There is nothing illegal about the design team participating in or even running the hiring process.

>HR design team and hiring (non-HR) team are one and the same playing fast and loose with privilege info, many lawyers will be all over this.

There is nothing illegal about this either. You have to show discrimination took place. Many companies separate some roles simply for additional legal protection.

>Of course, I am unwilling to find out because my priorities lies elsewhere but if and when I learn of the next Deaf applicant that got turned away because of lack of direct call support, then my priority of my legal team will change.

You weren't turned away. You refused to tell them you needed direct call accommodation, and then act like a victim when they didn't know. Do you expect them to read minds? Do you expect them to accommodate every possible request from applicants without need for explanation?

If you go to court, google will show it's HR policies and process for accommodating applicants that notify HR of their needs. They will point to applicants that asked for accommodation, and all the times HR provided it. They will then point out the fact that you or the next similar applicant did not inform them, and explain to the court that they are not mind readers.