Merge "Optimize SwapOffsets() to skip parsing unused information" am: 39313ad134 am: e702cf2676

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/1518563

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I157caefd3212f03f9ea7b7efeb842664d5eccd0d