I don't think that's air force one. My guess is they just had some staff on the private plane plate the burgers and fries using the normal plates and trays they'd serve any meals on and had them leave the bags in the back but leave the individual packaging for the food items so they could virtue signal eating the same food their fan club eats.

Another possibility is some high end chef was told to prepare burgers and fries and then use McDonald's packaging as a part of the presentation.