Merge "Centralize nsd associated files" am: 32942299d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1895244

Change-Id: I15a6d3eaca8b0244258d08b1dc5e46f0394609cb
tree: cda78beb6f39288443d88bd20a86fbe17dd2bf76
  1. core/
  2. packages/
  3. services/