ipacm: add support for wan ip address change in scc mode3

In SCC Mode 3, WAN interface can have multiple IP addresses.
Make changes to offload traffic with old IP address till it
expires and then enable offload path with new IP address.
If new IP address expires first, continue with old IP
address till it is available.

Change-Id: I00b05b844743e46f6f923416ed20123621662bd0
6 files changed
tree: a809748e076af4a323c3a3e175eedcf97e306a29
  1. hal/
  2. ipacm/
  3. ipanat/
  4. configure.ac
  5. ipacm_vendor_product.mk
  6. Makefile.am