Merge "Don't warn when there are no kernel buffers" am: 8ce2b060de am: 7523182935 am: 26cb6e2e6e

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmeminfo/+/2368288

Change-Id: Ic2d0aaee618799ccfec12fc4fa0f490b92f3e3d7
Signed-off-by: Automerger Merge Worker <[email protected]>