[MS70] Have BatteryStatsImpl use the public NetworkStats API

Test: BatteryStatsManagerTest
Bug: 204830222
  (cherry-picked from ag/16713581)
Change-Id: I35dd909b5da563cea27d8a81a81fe472c59e9b17
Merged-In: I35dd909b5da563cea27d8a81a81fe472c59e9b17
1 file changed