Clean Up NetworkManagementService Tests am: e7c4a3e7b5 am: 34d43318e1

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

Change-Id: Icaee85a789737c2b10f01aa7d7a669e9f7385bd7
tree: 33189f9d50a5da6d74416c8af5e281ffaec8ede7
  1. core/
  2. services/
  3. tests/