You can let USC know of the change by emailing the admissions representative for your area, which I assume is somewhere in socal. Look on USC site for find admissions advisor. How good they are at responding can vary.
You could switch to bio (not clear if that is even possible or if it is too late) or drop Physics and take it by itself in the summer. (But why are you doing bio if aero engineering??) Ask advisor if dropping for now would be issue. You can also call admissions - keep question simple - you have met all requirements except this last one and want advice on what to do for the physics/bio/science requirement.
Just fyi, if you are aero engineering, you have to master physics not just get through it. And physics at USC is brutal (as it is at most schools). Good luck!
Oh, there is also a very good transfer thread where you may get better/more advice…but I suggest contacting USC as well.
http://talk.collegeconfidential.com/transfer-students/1903737-2017-2018-usc-transfer-p1.html