Fix part of #6240: Adds e2e tests for prefered audio and site language in user's profile (#7456)
Fix part of #6240: Adds e2e tests for prefered audio and site language in user's profile (#7456)

* Adds e2e tests for prefered audio and site language in user's profile

* Addressed comments

* Minor nit

prasanna08/oppia,kevinlee12/oppia,brianrodri/oppia,oppia/oppia,prasanna08/oppia,brianrodri/oppia,prasanna08/oppia,kevinlee12/oppia,brianrodri/oppia,oppia/oppia,kevinlee12/oppia,oppia/oppia,brianrodri/oppia,kevinlee12/oppia,oppia/oppia,prasanna08/oppia,brianrodri/oppia,kevinlee12/oppia,oppia/oppia,prasanna08/oppia