Move net-test-utils to its own directory am: 0fb2de46f0 am: 3d9ec0a4b8 am: 8648b9fcba

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1654919

Change-Id: I7c71161258167d2ea71a988a1df2f87d9b12c234
tree: 303a1aabf872b329200de08b40042b51569c301b
  1. staticlibs/