Add default ciphering and integrity algorithms to use for when control messages are not available, e.g. when handing in to a target cell.

Change-Id: I35830fe04df5e5778c15cdb782982b2fbcda67ea
Reviewed-on: https://code.wireshark.org/review/3016
Reviewed-by: Evan Huus <eapache@gmail.com>
Reviewed-by: Martin Mathieson <martin.r.mathieson@googlemail.com>