google_battery: export current_avg for BatteryManager API

BATTERY_PROPERTY_CURRENT_AVERAGE needs to read current_avg from
battery/current_avg

Bug: 213289498
Signed-off-by: Jack Wu <[email protected]>
Change-Id: I5122cb48de25f5d5489ab15fc225d4d2e8902ce6
diff --git a/google_battery.c b/google_battery.c
index 11346f8..ea1837e 100644
--- a/google_battery.c
+++ b/google_battery.c
@@ -5704,6 +5704,7 @@
 	POWER_SUPPLY_PROP_CHARGE_COUNTER,
 	POWER_SUPPLY_PROP_CHARGE_FULL,
 	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
 	POWER_SUPPLY_PROP_CURRENT_NOW,
 	POWER_SUPPLY_PROP_CYCLE_COUNT,
 	POWER_SUPPLY_PROP_HEALTH,