Use parallel DNS resolution for PLMN-based FQDNs am: 97ed286682

Original change: https://android-review.googlesource.com/c/platform/packages/services/Iwlan/+/2169842

Change-Id: Iaeb1068b140a3826d7ec7bbe797fc9017c85c6c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>