Does a judgment become final when the availability of appeal and the time for filing a petition for certiorari have expired?

["[a] judgment becomes final when the availability of an appeal and the time for filing a petition for certiorari have expired"]; see also Bell v. Maryland (1964) 378 U.S. 226, 230 ["[t]he rule applies to any such [criminal] proceeding which, at the time of the supervening legislation, has not yet reached final disposition in the highest court authorized to review it"].) Accordingly, the trial court must be given the opportunity to consider whether to strike the firearm enhancements.