Merge "Add MdnsMultinetworkSocketClient" am: 6ea0c1d05b

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2278027

Change-Id: Icbeb23ac95c25a6eaa655473f3d706deccc8ca89
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>