Revert "Rename aidl_ include and src directories."

This reverts commit 5400741601.

Reason for revert: broke hidl build

Change-Id: I3954a1c0d6c0d7a663bd2a1c8c8888cae37cee80

libwvdrmengine/aidl_include/wv_metrics.h

@@ -0,0 +1,19 @@
+// Copyright 2021 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+//
+// Format widevine protobuf metrics
+
+#ifndef WV_METRICS_H_
+#define WV_METRICS_H_
+
+#include <string>
+
+#include "wv_metrics.pb.h"
+
+namespace wv_metrics {
+void FormatWvCdmMetrics(const drm_metrics::WvCdmMetrics& metrics,
+                        std::string& result);
+}
+
+#endif  // WV_METRICS_H_