Merge "libsnapshot: Add script to test snapshot updates" into main am: 6fb316bb44 am: ce19232805

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3323164

Change-Id: I85423f34255dd8c0879cf27fe86f7869abe5c6f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>