Merge "Add MdnsAdvertiser" am: 125ff06cba am: 8c2c1adb63

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2375262

Change-Id: I72c1a8177141fceaa56f2a8f0e8843c7f0c3dc01
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>