Merge "EthernetTetheringTest: add testTetherClatUdp" am: 8968739285

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2110088

Change-Id: I86030a3a3b6e504fa0ec84b09d68d598b39e5228
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>