Demoting a non-critical error to a warning: unable to load net cmd dll.

Bug: 7141069
Change-Id: Ib4326f80fd562d845095bad38f45ceb9f3be119e
diff --git a/InterfaceController.cpp b/InterfaceController.cpp
index 25200e9..e02b517 100644
--- a/InterfaceController.cpp
+++ b/InterfaceController.cpp
@@ -46,7 +46,7 @@
 	libh_ = dlopen(if_cmd_lib_file_name, RTLD_NOW | RTLD_LOCAL);
 	if (libh_ == NULL) {
 		const char *err_str = dlerror();
-		ALOGE("Error (%s) while opening the net interface command library", err_str ? err_str : "unknown");
+		ALOGW("Warning (%s) while opening the net interface command library", err_str ? err_str : "unknown");
 	} else {
 		sendCommandInit_ = (int (*)(void))dlsym(libh_, set_cmd_init_func_name);
 		if (sendCommandInit_ == NULL) {