Uses ymal SafeLoader instead am: 3e6c8ea1a7 am: 5305189c9b

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/extras/+/19491021

Change-Id: Ia56eb28cc5e9ae0e1177f6ef428bc200a57f8033
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>