Use an attribute for the network security config resource

Originally we went with the meta-data approach to make unbundling
easier, however with the amount of platform changes that the config
ended up relying on it would be better to focus on exposing it through
the platform.

Bug:28763009
Change-Id: Iaf80001b1980220cd2e1e05faf2dc86af41700e1
11 files changed