Merge "Replace useTls with mode in PrivateDnsConfig" into main am: 452feb2620

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2842798

Change-Id: I9cc87dd77bdd0b45f815a997608d002b94775dd4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>