[SP26] add CTS for NetworkStats

Test: atest NetworkStatsApiTest
Test: atest CtsNetTestCasesLatestSdk:NetworkStatsApiTest on Q device
Bug: 150644692
Change-Id: I690704b43cfd16de70c4c83916f6d750cf613f67
1 file changed
tree: feab536420bcf1772dc9a33bf4e7cf1786f519b3
  1. core/
  2. services/
  3. tests/