Revert "gn2bp: Remove `soong_namespace`" am: 8484ec4dcd am: 87731d6286

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2505958

Change-Id: I36f50cb48aefbbf021a5d300b127f449b5a05ff2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>