Use parallel DNS resolution for PLMN-based FQDNs am: 97ed286682 am: 72aa65f3da am: e2f0df64ce

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

Change-Id: I9855d2dd25acaf4827bb60d1529a7eab51bcb58e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>