CAS: Fix memory leak in FactoryLoader

Bug: 258638318
Bug: 262899644
Test: android.hardware.cas-service_fuzzer
Change-Id: Iff8a4e34a11f5a96e6c65cd84ee55f1712711670
diff --git a/cas/aidl/default/FactoryLoader.h b/cas/aidl/default/FactoryLoader.h
index f90b109..6a562f6 100755
--- a/cas/aidl/default/FactoryLoader.h
+++ b/cas/aidl/default/FactoryLoader.h
@@ -139,6 +139,7 @@
             queryPluginsFromPath(pluginPath, results);
         }
     }
+    closedir(pDir);
     return true;
 }