Generate file list installed from a filesystem, so it can be compared
with files installed from KATI.
Bug: 346873717
Test: File list generated with aosp_cf_system_x86_64
Change-Id: I8c8f555d57fee90753120f637dc3bc633f276a09
Merged-In: I8c8f555d57fee90753120f637dc3bc633f276a09