Merge "Added DROP opcode support to ApfGenerator for immediate return." into main am: 1633b047c8

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2862528

Change-Id: I464f78cbca881729d1586da224fb0f7d80135946
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>