VTS for Netlink Interceptor needs access to netlink_route_socket, and
other services routing traffic to Netlink Interceptor may as well.
Bug: 201467304
Test: VtsHalNetlinkInterceptorV1_0Test
Change-Id: Ic52e54f1eec7175154d2e89e307740071b1ba168
Make Netlink Interceptor work when SELinux is enforcing
Test: Netlink Interceptor HAL comes up and works
Bug: 194683902
Change-Id: I3afc7ae04eba82f2f6385b66ddd5f4a8310dff88