Merge "[Thread] graduate CtsThreadNetworkTestCases from postsubmit" into main am: 24ae5c2d06 am: 01064d675f am: d2776408ef

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

Change-Id: Ia0ff005601f7f5832255f0701183ac7e25c9fb60
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>