Allow health HAL to select specific paths to be used, overriding
default search for arbitrary power supplies with the named paths.
Change-Id: I5f724739f58ef56087ab592b7403fc083db8f173
uA and uAh units are converted to mA and mAh.
If current_now is present, add it to the heartbeat log (c=nnn).
Change-Id: I2b5fe7b4505c98ca2d11c3f94564c1c38493c8b9
Initially moving battery health monitoring here.
Command line flag -n tells healthd not to use (or wait for) servicemanager
in this execution, for charger and recovery modes.
Change-Id: I1720594724af0c068497b359f9c6ad65aeaa1519