[ALPS03861775] Remove the sysfs_power_supply label

[Detail]
Since Android P, battery-related information should be declared as native
sysfs_batteryinfo, which can be accessed by healthd and other processes
asking for battery information.

[Solution]
1. Remove sysfs_power_supply.
2. Change the usage from sysfs_power_supply to sysfs_batteryinfo.

MTK-Commit-Id: 5713190900415312f7904cdf6d46a891996d5786

Change-Id: I10099570afdb48f0806d6979a3fb11b9b9e59fbe
CR-Id: ALPS03861775
Feature: Charger