healthd: rename service batterypropreg => batteryproperties

Part 1 of 2 (to avoid transitory runtime crashes).

Change-Id: I40d990ef7ee18cea99e5add39738bbe9fd5701ca
diff --git a/healthd/BatteryPropertiesRegistrar.cpp b/healthd/BatteryPropertiesRegistrar.cpp
index 7add9bc..52e6be0 100644
--- a/healthd/BatteryPropertiesRegistrar.cpp
+++ b/healthd/BatteryPropertiesRegistrar.cpp
@@ -32,6 +32,7 @@
 
 void BatteryPropertiesRegistrar::publish() {
     defaultServiceManager()->addService(String16("batterypropreg"), this);
+    defaultServiceManager()->addService(String16("batteryproperties"), this);
 }
 
 void BatteryPropertiesRegistrar::notifyListeners(struct BatteryProperties props) {