tree cb002235b4ad6ce7803f8b8f5b83a16d82115152
parent e5e9ee41d9de64db195095c2ed7a2474c2374a34
author Yifan Hong <elsk@google.com> 1568411393 -0700
committer Yifan Hong <elsk@google.com> 1568750123 -0700

libsnapshot: Add snapshot metadata updater.

This class knows how to update super metadata for virtual A/B devices.

Test: libsnapshot_test
Bug: 138816109

Change-Id: I9e375c76814e0dcbb47fc2ea9e4903ba69ccf7f8