Merge "Pull vma.usage.vss updates out of for-loop" am: c08c120d0e am: bb4c752c78 am: 3b36866ed5

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/2032744

Change-Id: I22a716853af7a30f5541ddc674ab23f1a0da69b8