[3.0] access: live555: Adapt to 2020.12.11+ API changes

Since live555 2020.12.11, the API has changed. This should fix builds with the latest version while still allowing contribs to pass.

Ref !1897 (closed). Fixes #25473 (closed).

Co-authored-by: Dominic Mayers dominic.mayers@meditationstudies.org Co-authored-by: Pei Jia jiapei@longervision.com (cherry picked from commit 70fedf25)