[res] Enable zero-copy assets access

libziparchive supports using the provided memory buffers
directly when exracting compressed files, but it requires
explicit opt in in the implementation of its interfaces.

This CL ensures the functions we use for reading compressed
assets use those.

Flag: EXEMPT small optimization
Test: build + boot + atest libandroidfw_tests
Change-Id: I6bcb73081e027b503b8513cf1d732c556df39012