Merge "Add setFirewallChainEnabled API" am: 9bba8e8c78 am: e7da24518c

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1916597

Change-Id: I9b0689b0b0ab0cb39a1c1bd7e101d6037370f9d3