[SP04] add unit test for NetworkStatsProvider am: a97b5c3bb3 am: a51ef24361

Change-Id: I0ce508b3ccf22b01603de7246b2068d3b1a2afcd
tree: 42f61da4de62d5548a8b2e4dfdbbe6dc9d79be4a
  1. core/
  2. packages/
  3. services/
  4. wifi/