batteryservice: expose battery status

#include "BatteryServiceConstants.h"

// must be kept in sync with definitions in BatteryProperty.java

// must be kept in sync with definitions in

// frameworks/base/core/java/android/os/BatteryManager.java

enum {

    BATTERY_PROP_CHARGE_COUNTER = 1, // equals BatteryProperty.CHARGE_COUNTER constant

    BATTERY_PROP_CURRENT_NOW = 2, // equals BatteryProperty.CURRENT_NOW constant

    BATTERY_PROP_CURRENT_AVG = 3, // equals BatteryProperty.CURRENT_AVG constant

    BATTERY_PROP_CAPACITY = 4, // equals BatteryProperty.CAPACITY constant

    BATTERY_PROP_ENERGY_COUNTER = 5, // equals BatteryProperty.ENERGY_COUNTER constant

    BATTERY_PROP_CHARGE_COUNTER = 1, // equals BATTERY_PROPERTY_CHARGE_COUNTER

    BATTERY_PROP_CURRENT_NOW = 2, // equals BATTERY_PROPERTY_CURRENT_NOW

    BATTERY_PROP_CURRENT_AVG = 3, // equals BATTERY_PROPERTY_CURRENT_AVERAGE

    BATTERY_PROP_CAPACITY = 4, // equals BATTERY_PROPERTY_CAPACITY

    BATTERY_PROP_ENERGY_COUNTER = 5, // equals BATTERY_PROPERTY_ENERGY_COUNTER

    BATTERY_PROP_BATTERY_STATUS = 6, // equals BATTERY_PROPERTY_BATTERY_STATUS

};

struct BatteryProperties {