Merge "Immediately create native networks when NetworkAgents register." am: 18cdec34dd am: c23446db3e

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

Change-Id: I27dd0543f41b868072daade12ecf6f9cd81acf36
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>