COMPMID-415: Move ActivationLayer to new validation

Change-Id: I38ce20d95640f9c1baf699a095c35e592ad4339f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/81115
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
17 files changed