Merge "Update NetworkAgent#register to compatible with old NetworkAgentTest" into main am: f73d80b61c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2849874

Change-Id: I061fbb2a43ae390611671f493fc0e3dd5bc03b57
Signed-off-by: Automerger Merge Worker <[email protected]>