Add a new interface and a new management object,
IpSecTunnelInterface to the IpSecManager surface.
This object will be used to control IPsec tunnels.
-Add IpSecTunnelInterface object
-Add methods to create and use an IpSecTunnelInterface
-Update the IpSecTransform builder to create Tunnel
mode IpSecTransform objects (usable with an IpSecTunnel)
Bug: 36033193
Test: compilation
Change-Id: Ib6948b12c15c93674234dc36288058ae44435b90