Split NetworkUtils and NetworkUtilsInternal

NetworkUtils is planned to move to a dedicated JAR for connectivity
classes, while NetworkUtilsInternal would stay in the
frameworks-minus-apex JAR, in the com.android.internal.net package.

Bug: 171540887
Test: m, boots, wifi working
      atest FrameworksNetTests
Change-Id: I3d38d72ad23a4bf84af823c7baeb6fed25c0665f
5 files changed
tree: cdbe6c1efe9726fcfed5c0bb01ca4879614f1049
  1. core/
  2. services/
  3. tests/