Replace established atom required fields with optional am: 05668a13

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2194140



Change-Id: I03e7add1d1da342512ba9a7a87d87cb0e9ccfc30
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
(cherry picked from commit 900e3e85)
Merged-In: I03e7add1d1da342512ba9a7a87d87cb0e9ccfc30