In the case that Andal won, how would this seat be gerrymandered for him?
It would likely be gerrymandered to get rid of him or possibly place him in the same district as Rick Randovich. Democrats are likely to control redistricting here and California is one of the few big states that they control.
Gerrymandering in California is bipartisan and designed to favor incumbents.
That's generally not true. In 2002 Democrats draw the lines to protect incumbents because they had more of them in tough seats to defend. The only states where gerrymandering is bipartisan are in Washington, Arizona, New Jersey, and Iowa.
Someone is confusing gerrymandering with redistricting, bipartisan with nonpartisan and New Jersey with Arkansas. Hard to make many more such obvious mistakes in three lines.
I hope you were under the influence when you wrote that.