Merge "Thread: add multi-device test" into main am: 45d7e1cffd

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3081404

Change-Id: I1db98c130ef6dea281172b582c36610c5189ebda
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>