Merge "Enable Gratuitous Neighbor Discovery feature by default." into main am: ac2304f146 am: 05e9f2605d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2651479

Change-Id: I9655ae573c2bace050b59f17530b19e85b39557d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>