Test: Deflake RepeatedSetup_KeepChangingPrivateDnsServers am: 19b5229f am: 560c1ea8 am: 15d5adce

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2330376



Change-Id: I7642a607951e0553c30a201ed56e402e8e2e08cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>