health 2.1 impl: log values properly.

getHealthInfo_2_1 calls UpdateHealthInfo, where a subclass may
update health_info without updating the data in BatteryMonitor.
Hence, calling battery_monitor_.logValues() isn't accurate.

Log values properly by logging the updated health_info struct.

Test: healthd kernel logs have correct data
Fixes: 179326883
Change-Id: Ifab863746793abf3e3f1d5a458f05f4d9889bdfc