Ensure the Thread integration test only run on CuttleFish devices am: d5e2ac94d1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2911295

Change-Id: Idb744445222085450de94d0bf6d645fb905e8edc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>