Merge "Add API to get current firewall chain status" am: 6421d8456c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2117045

Change-Id: I7e08bb6b6fafee55cb9e95a627755bc9745ef15e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>