Merge "[Thread] add CTS test for registerNetworkCallback for Thread" into main am: ad93a191e7 am: e1aa842d74 am: 16e1de30a9

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2909780

Change-Id: I484b2b94f1b6aad55f81e4433c954521b98f103e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>