Add net-utils-annotations lib

- Move PolicyDirection into frameworks/libs/net
- Add net-utils-annotations lib for those methods that are using
  PolicyDirection annotation.
- Add net-utils-annotations-srcs for including PolicyDirection to
  their filegroup.

Bug: 203634639
Test: m
Change-Id: I7b8b3bdcc3be5fca9baa5a9ce656756843e03527
2 files changed
tree: 0472aba5f394f531905d71cb0723b41df7ec84ee
  1. staticlibs/