Change build-release target for building module sdks

--build-release=latest => Include all new APIs in API tracking files
along with the @FlaggedAPI annotation prefix.

--build-release=next => Include only those new APIs in API tracking
files for which the flag is enabled. Also the @FlaggedAPI annotation
prefix is removed from API tracking files.

Ignore-AOSP-first: VIC finalization happens outside AOSP
Bug: 335454564
Test: croot && build/tools/finalization/localonly-steps.sh
Change-Id: I3fdd71ac385835b3b961336d86604e86dfed31cf