Move package parsing to services.jar

This facilitates exposing the Parsed_ classes as
@SystemApi(client = SYSTEM_SERVER) while keeping everything inside
services.jar rather than having it split across both jars.

This reverts getPackageArchiveInfo to use legacy PackageParser, since
framework.jar can no longer access the moved classes.

Bug: 214038417

Test: presubmit, no logic changes

Change-Id: I152d70fb4f643d32efb012cfb20b0fbc5f88f2d8