Remove unnecessary converting us to ms in BatteryInfo

The class "Estimate" has the menber estimateMillis and
the unit of batteryUsageStats.getBatteryTimeRemainingMs() is millisecond,
so converting from us to ms is unnecessary.

Bug: 187379252
Test: make RunSettingsRoboTests
Change-Id: Iefbd8751608eb749367cf08a4a9b184b948a6d33
1 file changed