Revert "LightService: don't use implicit cast of Return<*>"

This reverts commit 9893740dbcadd2fb86dc4c2e200b3c17b62995c8.

Reason for revert: <INSERT REASONING HERE>

Change-Id: Ib522886cb5007a2cab5bcf43643e29207fa8ea1b
diff --git a/services/core/jni/com_android_server_lights_LightsService.cpp b/services/core/jni/com_android_server_lights_LightsService.cpp
index 50d51a5..a3ab8f6 100644
--- a/services/core/jni/com_android_server_lights_LightsService.cpp
+++ b/services/core/jni/com_android_server_lights_LightsService.cpp
@@ -123,7 +123,7 @@
             return;
         }
 
-        status = ret.get(); // hal status
+        status = static_cast<Status>(ret); // hal status
     }
 
     switch (status) {