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: I1b05635313e4fd680ad0a9cd9b4baa0df0f03c2b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>