Apply IPrivateDnsServer to PrivateDnsConfiguration am: cf56d23d am: 4743607e am: ac384a7a am: 86f7b4c3

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/1690509

Change-Id: Iad927e05a085eb67512cb7ac634d534badcab71e