Propagate shared library destination path through FilesToZip

Shared libraries in fuzz zip files may have a different filename than
their source file, for example when the source file is a prebuilt in
the source tree.  Propagate the computed library name through
FilesToZip to soong_zip to use the correct name in the zip file.

Bug: 254867347
Test: builds
Change-Id: Ib0def8decdbec7842b8e1a9056fac373d743bac0