You can use HEK293 for Adenovirus propagation because HEK 293 cells are transformed by introducing the sheared fragments of human Ad5 DNA and are shown to express Ad5 E1a and E1b genes. Therefore HEK293 would be better for this purpose.
As Malcolm Nobre said, basic HEK293 cells are well suited for adenoviral production, and HEK293T cells would also work. If you're planning on making several adenoviruses or trying to maximize viral titers, I would recommend looking into the AdEasy system from Agilent (https://www.agilent.com/store/en_US/Prod-240009/240009). They provide a HEK293-derived cell line that has increased adherence and increase viral production.