tree c344ff119a30a459d1a49eb39efebe96947b563e
parent 7729c21a473c7da5457786d12b65884ba3a2f594
author David Anderson <dvander@google.com> 1625021749 -0700
committer David Anderson <dvander@google.com> 1625179149 -0700

Record the source build fingerprint in SnapshotMergeStats.

This also adds a manual call to WriteState(). If update_engine crashes
or the device reboots, it's possible that certain stats (such as the COW
file stats) will be gone by the time the merge state is recovered.
Forcing a write prevents this.

Note that the write was previously implicit in set_cow_file_size, but is
now explicit before calling InitiateMerge().

Bug: 188909957
Test: manual test
Change-Id: I27cdc72272a9fa4ff5df4968e200fc14f63d0146
Merged-In: I27cdc72272a9fa4ff5df4968e200fc14f63d0146