Merge "libsnapshot: add check for updating next_data_pos_" into main am:...

Merge "libsnapshot: add check for updating next_data_pos_" into main am: 004187ac am: d73b1da0 am: a9c99765

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2896585



Change-Id: I0f588e7385c9a8622ea97976fb9a25cd14ab67bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>