Merge "Move MtsEthernetTetheringTest back into TetheringTest" into main am: 574bcb7f06 am: 7865dbc991

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3118546

Change-Id: I9faf1aac6edd396b2d9e7fa629a6a2dc078009fb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>