Merge "libsnapshot: implement resume buffer" into main am: a4f80e5c

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



Change-Id: I4e089b84434a56a62c16e08b0a7050079be3d002
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>