Merge "libsnapshot: Fix inconsistency in how merge ops are counted." am: 16aa3c9573 am: b0b9d35d2a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1767246

Change-Id: Iefb3c946a6ef3b54357e1aadddbe3627f9ffdf11