Graduate ThreadNetworkIntegrationTests from postsubmit am: 7cc1c37c5f am: 445224c35b

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

Change-Id: Ic7ff4420ae0947f2d201dce47b96980067f12b9f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>