healthd: Add support for HVDCP_3 chargers

HVDCP_3 is a high voltage DCP charger where the charger's voltage
can be changed by issuing pulses on the D+/D- lines. Add support to
recognize it and treat it as an AC power source.

Change-Id: Ib719529904e8b7a676bbdc5f5953f0f9da6df3fa

Author: Abhijeet Dharmapurikar

healthd/BatteryMonitor.cpp

@@ -150,6 +150,7 @@ BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String
             { "USB", ANDROID_POWER_SUPPLY_TYPE_USB },
             { "USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC },
             { "USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC },
+            { "USB_HVDCP_3", ANDROID_POWER_SUPPLY_TYPE_AC },
             { "USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC },
             { "USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC },
             { "USB_C", ANDROID_POWER_SUPPLY_TYPE_AC },