Merge "libsnapshot: Add a tool for inspecting COW files." am: 4e4cff7e46 am: 58c45b4f06 am: a7ba543f6f am: 9d55b815f1

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1475325

Change-Id: I1ffdaf029f1e854506291f2213e3274c777f6fc2