Merge "libutils: Fix missing definition of shared_ptr and unique_ptr" am: dfdcc31d03 am: 11c22fcc00

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2318113

Change-Id: I9aaad4f9d69b05fbfb76ad2541ceea9d2f3b6153
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>