Enforce structural NetworkAgent constraints am: 78c9a381c9 am: f9d930b816

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2805415

Change-Id: Ib362970b0570f7c095554f1bac241020c29c8cfb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>