Revert "Rename aidl_ include and src directories."

This reverts commit 5400741601.

Reason for revert: broke hidl build

Change-Id: I3954a1c0d6c0d7a663bd2a1c8c8888cae37cee80

libwvdrmengine/aidl_include/WVCreatePluginFactories.h

@@ -0,0 +1,24 @@
+//
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+//
+
+#ifndef WV_CREATE_PLUGIN_FACTORIES_H_
+#define WV_CREATE_PLUGIN_FACTORIES_H_
+
+#include "WVDrmFactory.h"
+
+namespace wvdrm {
+namespace hardware {
+namespace drm {
+namespace widevine {
+
+std::shared_ptr<WVDrmFactory> createDrmFactory();
+
+}  // namespace widevine
+}  // namespace drm
+}  // namespace hardware
+}  // namespace wvdrm
+
+#endif  // WV_CREATE_PLUGIN_FACTORIES_H_