Clean Up NetworkManagementService Tests am: e7c4a3e7b5 am: 34d43318e1 am: 9653c209c6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1505233

Change-Id: I24c7401ae08da82ad8e03db1b507abe50e92dd1b
tree: af81b9d7d84c6618394949ef100889263cd5bd04
  1. core/
  2. services/
  3. tests/