Deprecate BatteryStatsHelper and BatterySipper

Remaining clients of BatteryStatsHelper and BatterySipper should switch
over to BatteryStatsManager.getBatteryUsageStats()

Bug: 191877985
Test: N/A
Change-Id: Icb55e574a3d91bc6bef716e6724b352ef3d426b3
2 files changed