Merge "libutils: RefBase always disallow on stack" am: 51e98b8378

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2166102

Change-Id: Ia8b3205fbb6e36b3c85a378df4c63db4f32759f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>