zip_archive: generalize deflate method.

Remove dependencies on zip_archive specific data structures. In follow
up changes, this method will be promoted to a public API and used from
androidfw/ZipUtils as well as tools/zipalign, thereby allowing us to
remove a near-exact copy of this code and to simplify depdencies.

Test: zip_archive_test
Bug: 35246701
Change-Id: If24a9965fbd6fff308c8758859026684fd2af3b9