Structurally mounting to hollow brick
I would never hang a deck off a brick veneer or any finish, you have to attach to something structural.  The pullout force generated by the cantilever is going to be tremendous.  When it fails, it won't be a minor mishap.
Honestly I wouldn't go anywhere near this without putting a lot more thought into it, getting an engineer or architect's stamp on the plan, and getting it inspected.