[FIX] mail: avoid activities handling on view without activity_ids field
[FIX] mail: avoid activities handling on view without activity_ids field

task-2314240

closes odoo/odoo#55618

Signed-off-by: Alexandre Kühn (aku) <22220c18caede9806cb42c8e2b41136d711673bf@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo