Dissect 3GPP AVP Presence-Reporting-Area-Elements-List.

Change-Id: Ic7b99d41a275fb6f50758ea87763844f24be537c
Reviewed-on: https://code.wireshark.org/review/4495
Petri-Dish: Anders Broman <a.broman58@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>