ConnectivitySettingsManager and CtsNetUtils are doing the same thing to set/get private DNS related settings. To prevent making the duplication code in two places, move the body to frameworks/libs/net and call it. Bug: 185311744 Test: atest CtsNetTestCases CtsNetTestCasesLatestSdk Original-Change: https://android-review.googlesource.com/1719017 Merged-In: I3272c825b86ec30c3d0bf4097088c653e668461b Change-Id: I3272c825b86ec30c3d0bf4097088c653e668461b