Merge "libsnapshot: implement resume buffer" into main am: a4f80e5c am: 7786db0a am: d5d052a7

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



Change-Id: I54321638809d1b2f3f9b1b5c79e4333a4ef29286
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>