Merge "Add setFirewallChainEnabled API" am: 9bba8e8c78 am: e7da24518c am: 8be68c843f am: f14b8b39ab

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

Change-Id: I30abe78f90112233e0792ccba7de02eb4de4e85a