Merge "libsnapshot: Add Parser v3 + stub" into main am: c9c120e0

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2815834



Change-Id: I74fe8f0af192a71b66c7f068653d17a78304cd0a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>