Merge "[Thread] define flag thread_user_restriction_enabled" into main am: e32111c8fc am: aba9b7ceb0 am: f698c9706e

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

Change-Id: I6457aa7dd632160591f4c2bea09627b90e861d1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>