Do the schools on your transfer list even accept SAT scores taken after HS?
I agree with ucbalumnus that it’s going to be a very hard sell to transfer after your freshman year. 7 AP courses in HS is fine in terms of rigor, but you got 3s and 4s on the exams. Transfers to these schools are much harder to come by and one year of college courses is not going to erase 4 years of HS.
IMO, your best bet is to try as a junior transfer after you have two solid years of college GPA under your belt and hopefully some internships (not so easy to get as a freshman so not something you can absolutely plan for, especially at a company like Google).