Merge "Add DnsResolverServiceManager" am: 6bc7032b85 am: b3ea5a5a71 am: 206c66213e

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1465502

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia89725249d9d6fca7a56b426a4bcb024ac8b1bb8