Merge "Add an integration test to verify zero-length DHCP packet." am: 8da5ff4b5f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2554930

Change-Id: I90291d3cb9762713c6f5b9d807a7b027ddafaaf8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>