DO NOT MERGE: Initialize the ZipArchive to zero before parsing

The fields of the ZipArchive on the stack are not initialized before we
call libminzip to parse the zip file. As a result, some random memory
location is freed unintentionally when we close the ZipArchive upon
parsing failures.

Bug: 35385357
Test: recompile and run the poc with asan.
Change-Id: I7e7f8ab4816c84a158af7389e1a889f8fc65f079