[BugFix][Memory]fix libsmapinfo initial integer type warn in class am: 33bf587327 am: baeb936980 am: dbfb8e17c8

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/2760330

Change-Id: I3b0a5ed68482196f1e7ed2dcbcf200ba3e3ebf4c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>