Clean up featuresutils library

dlclose the featureutils library when closing the driver.
Had tried closing inside load_angle but that won't work
due to threading and we will have a featureutil resource
we want to keep around.

Bug: 118613436
Bug: 118375731
Test: monkey UI testing
Test: cts-tradefed run singleCommand cts -m CtsAngleIntegrationHostTestCases

Change-Id: I40b13c679665951935f0e7254f24c384645365f3
diff --git a/opengl/libs/EGL/Loader.h b/opengl/libs/EGL/Loader.h
index 9cc73f3..392887d 100644
--- a/opengl/libs/EGL/Loader.h
+++ b/opengl/libs/EGL/Loader.h
@@ -51,7 +51,7 @@
     ~Loader();
 
     void* open(egl_connection_t* cnx);
-    void close(void* driver);
+    void close(egl_connection_t* cnx);
 
 private:
     Loader();