Merge "Add safety comments." into main am: 367ade7e am: 725d5253 am: d8d954a0 am: d262d190

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2671476



Change-Id: Ia5094768d0a88e5b202dc7a7b8e6f562fd6c531a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>