Merge "[Thread] graduate CtsThreadNetworkTestCases from postsubmit" into main am: 24ae5c2d06 am: 5ed668d82b

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

Change-Id: Ie4c9fb59948a1ea70d4921d7f6dfbe9f9aed1b09
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>