Create a friend method for reporting battery health

Bug: 71860528
Test: Test: vts-tradefed run vts -m VtsHalHealthV2_0
Change-Id: I6c56c601ee59fe33ee4a19dd4aeafbe3a1bd4c72
diff --git a/healthd/BatteryMonitor.cpp b/healthd/BatteryMonitor.cpp
index 676ee41..561948c 100644
--- a/healthd/BatteryMonitor.cpp
+++ b/healthd/BatteryMonitor.cpp
@@ -86,6 +86,10 @@
     initBatteryProperties(&props);
 }
 
+struct BatteryProperties getBatteryProperties(BatteryMonitor* batteryMonitor) {
+    return batteryMonitor->props;
+}
+
 int BatteryMonitor::getBatteryStatus(const char* status) {
     int ret;
     struct sysfsStringEnumMap batteryStatusMap[] = {