It's highly unlikely that a standard UA being performed at a halfway house would run tests for aas. They would have to specifically be testing for that and I've never heard of a rehab program that run tests for aas as part of their normal testing.
Haha nah they don't test for it dude , you'll be fine , I would just do tabs though bro and put them in vitamin containers cause if they find syringes u are screwed , or keep all ur steroids at ur gym in a locker