Merge "Replace useTls with mode in PrivateDnsConfig" into main am: 452feb2620 am: d2f934a727

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

Change-Id: I2185b143de4e2d5f4d5deff2ed2d3ee7ea5be10b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>