Merge "Use system API to obtain IDnsResolver IBinder" am: 72b76f301a am: 54984e44c2

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1475820

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia1352dd2276585cbacb48dbe952c4f90b0e4a2e5