Merge "[Thread] define flag thread_user_restriction_enabled" into main am: e32111c8fc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2897512

Change-Id: I5f214fb087f317d1b8b1eb733bd862697e46387d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>