[automerger skipped] Add methods for updating ingressDiscardRule bpf map to BpfNetMaps am: b01647922d -s ours

am skip reason: Merged-In I42bc0adc22c3018480029d624053f758d815e526 with SHA-1 77b49996d2 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/28712473

Change-Id: If1190a4da6913e70ba0544ee95db362b787202f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>