Merge "[Thread] refactor IntegrationTestUtils to use Kotlin" into main am: f991318e8c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3254289

Change-Id: I998f954d1fb2df5369dcde20707ccbd1d062a570
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>