provide a resource overlay to configure customized DNS Server.

Bug: 122621524
Test:  atest FrameworksNetTests NetworkStackTests
Merged-In: I123b3d4516cc6ba6d17629eb74daf448ba7121eb
Merged-In: Iba867a3b7bda1f5db9dfa1b7521d4a4badbf88e0
(cherry picked from commit ac7eb77b90d830179358242fd6e594cc28c0cc31)

Change-Id: Iab8b57ae1bc81c12ce07f849c7820977a9061d55
2 files changed