Merge "Immediately create native networks when NetworkAgents register." am: 18cdec34dd

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2162425

Change-Id: I0e86a541321f56307573e3969ed7e3f6b035e657
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>