8006193: (process) Clean-up java.lang.ProcessImpl.finalize, does not need to be public

Reviewed-by: alanb

src/windows/classes/java/lang/ProcessImpl.java

@@ -234,7 +234,7 @@ final class ProcessImpl extends Process {
         return stderr_stream;
     }
 
-    public void finalize() {
+    protected void finalize() {
         closeHandle(handle);
     }