<p>I don’t think you have to take the CivE degree classes (ie Chem 1A, E7) your first semester, especially as you plan to switch out. They won’t kick you out or anything. And, as mentioned above, you need your math classes for either of your other possible majors. Sign up for classes as if you were going in as a CS/pre-Haas major, but check with your engineering advisors when (or before) you start to make sure.</p>
<p>Keep in mind that AP tests will only get you out of some of the breadth requirements. In L&S specifically, the 7-course breadth cannot be satisfied by any AP test. In engineering, you can test out of 2 lower-div humanities but must take at least 2 upper-div classes. Furthermore, my personal opinion is that AP Physics should not be used to test out of Physics 7. I 5’d the Physics C tests and knew almost nothing about the course material when I started the classes 
But you probably had better high school teachers than I did in physics.</p>