Merge "libsnapshot: implement resume buffer" into main am: a4f80e5c am: 5ed85a5e am: 87959e8b

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2816891



Change-Id: Ib5831016d83b79feb4d7274b52d267c54fd21e30
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>