netbpfload: simplify attach type related logic am: 346831c66f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3216956

Change-Id: Ia2d4ebd4be2ec97c12738741c1e4e3cc33222248
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>