Graduate ThreadNetworkIntegrationTests from postsubmit am: 7cc1c37c5f am: 09801e6379

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2911490

Change-Id: Ia37d24a40fc983a0cd198b35af685af0fb142e1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>