DO NOT MERGE: Update OEM iptable hooks and ip fwd
This is a squash of two changes from partner repo:
Clean up OEM iptables hooks
Id: Ife7a1c08ca88beba2dede776d2e4dd6097dad05a
And
Add hooks for OEM iptables rules and IP fwd
- Useful for integrating peripherals that use IP for control and
diagnostics.
- Add hooks for specifying static iptables rules at startup.
- Add system prop to keep IP forwarding enabled all the time.
- Remove the ro.bootmode=bp-tools hacks.
Id: Ic70d4c88179c530414505976193bf616037500a6
Bug:
5045218
Change-Id: I4229d3576426880b68ac448f9fbb67f2f8f304a0