Booting up the device without usb, the kernel sets the usb power supply
type as UNKNOWN. The type of usb power supply changes at run-time as
various chargers are plugged in/out. However, healthd initilizes the
charger list only at bootup. Change it such that it checks for charger
type changes with every battery or usb uevent.
While at it, the kernel may have a power supply type which is not known
to healthd. This is perfectly fine. Update healthd to not print a
warning.
Change-Id: I2ec9f9a420ca61814d43c316b418ce94de3691bc
Former-commit-id: 08a453898adf2f5bfb594396d6d915d68ebb67b8
Change-Id: I7d5675b4e9a8a23228b0255071dd6965cdd43d6d
7cd8f3162a