Add fingerprint to package map.

Revert of revert of aosp/3256996, original fingerprint change which
caused the crash. This change is safer because 1) writing v2 is set up
for flag guarding in main.rs create-storage (right now the flag isn't
set so we just use the default file version, 1) and 2) we maintain the
ability to read and write both v1 & v2. Expanded tests to read both
versions.

Test: atest
Change-Id: I403e43f84d6d72383d2ca075ca36aa75f16a649e