Merge "Add vma read method that allows passing reusable buffer" am: 8d9a8f8d4c am: 1691d7a9f8 am: b353ac0e61

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/2392954

Change-Id: I3d3a8c01ca011d14a6ef9621d92a481eb547177f
Signed-off-by: Automerger Merge Worker <[email protected]>