Merge "Add utilities for network validation testing" am: ff15197c34 am: fe093f509b am: ab7803d2d4 am: 3ecfe55730 am: ae4f8b0103

Original change: https://android-review.googlesource.com/c/platform/cts/+/1364518

Change-Id: I44e6b0ce9e887b2d6dfc58739c69c9791a2b096b
tree: 6514bdeb25c2594a63380bfaadc3b11d8bf838b8
  1. tests/