rtphdrext-clientaudiolevel: Rename RFC 6464 element
Copied from https://gitlab.freedesktop.org//gstreamer/gst-plugins-good/-/merge_requests/1085
Multiplying elements named after RFC numbers is confusing, so let's give them meaningful names.
Copied from https://gitlab.freedesktop.org//gstreamer/gst-plugins-good/-/merge_requests/1085
Multiplying elements named after RFC numbers is confusing, so let's give them meaningful names.