Merge "[Thread] graduate CtsThreadNetworkTestCases from postsubmit" into main am: 24ae5c2d06

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2804113

Change-Id: I99c9ad911c0cc2a4e7ca8f658fca19a7ea9ed3b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>