Merge "Send GARP and unsolicited multicast NA after L2 roaming." am: e5ec4d007c am: 84c7c164d7 am: 95b909f19f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1679586

Change-Id: Iba75acef874a8ab3380bb9e881a0358fb443f329