Merge "[Thread] refactor IntegrationTestUtils to use Kotlin" into main am: f991318e8c am: 57ff10c4ed

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

Change-Id: I2d1d59578c42faf58f1a47604b2966a89b54e2fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>