libmeminfo: force root for vts_core_meminfo_test am: fee412f9db am: 3febbea06c

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/11785306

Change-Id: I23e5e73c0c78180cbf46f222081e969c6c5722fc