"Ten things undergraduates need to know
Upon admittance to the University of California, your resident or nonresident classification is determined for purposes of tuition and fees only after you have completed and submitted a Statement of Legal Residence (SLR) to the campus residence deputy.
If you are not a California resident when you enroll, and you remain a dependent undergraduate, it is unlikely that you will be able to qualify as a California resident for purposes of tuition while you’re an undergraduate at UC."
Looks like your moving to CA won’t make any difference. The state schools do not have out of state “fees” as such; it’s a bit of a misnomer. What state schools actually do is reduce costs for state residents, who have been supporting the schools by paying state income taxes. So far, your family has not contributed to the schools, so there is no reason for a discount.