zip_archive: reject files that don't start with an LFH signature. Bug: 64211847 Test: zip_archive_test (cherry picked from commit c1a56dcab711a7ee238c0af865920ca51b1408a6) Merged-In: I275e7c4da05ceeb20401b560c72294f29ef63642 Change-Id: Ib89f0def696206ff427be27764c158fab88e4b5d (cherry picked from commit 9dced1626219d47c75a9d37156ed7baeef8f6403)