Cherry pick 18.4 changes to udc-widevine-dev

Get the udc-widevine-dev Android branch and oemcrypto-v18 cdm branch in
sync. The commit ID for 18.4 on oemcrypto-v18 is
a2f23a2281e5e06dc2867585bdc516fa132b6396.

Merged from go/wvgerrit/190151

Bug: 290252845
Test: WVTS tests are running and passing
Change-Id: I457332e7ca70a5b5169345e1279b3eb9f18413b6

libwvdrmengine/cdm/include/stderr_logger.h

@@ -0,0 +1,28 @@
+// Copyright 2023 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+//
+// You can use this implementation of ILogger when calling Cdm::initialize() in
+// order to log all messages to stderr. This preserves the behavior of past CE
+// CDM releases.
+#ifndef WVCDM_CDM_STDERR_LOGGER_H_
+#define WVCDM_CDM_STDERR_LOGGER_H_
+
+#include <iostream>
+#include <string>
+
+#include "cdm.h"
+
+namespace widevine {
+class StderrLogger : public Cdm::ILogger {
+ public:
+  StderrLogger() {}
+  ~StderrLogger() override {}
+
+  void log(const std::string& message) override {
+    std::cerr << message << std::endl << std::flush;
+  }
+};
+}  // namespace widevine
+
+#endif  // WVCDM_CDM_STDERR_LOGGER_H_