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/create_cert_cc.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC. All Rights Reserved. This file and proprietary
+# source code may only be used and distributed under the Widevine License
+# Agreement.
+
+"""Creates a cert.cc file from a cert.bin file."""
+
+import argparse
+import pathlib
+import sys
+
+if __name__ == '__main__':
+  parser = argparse.ArgumentParser()
+  parser.add_argument('input')
+  parser.add_argument('output')
+  parser.add_argument('--variable', default='DeviceCert')
+
+  options = parser.parse_args(sys.argv[1:])
+  in_path = pathlib.Path(options.input)
+  dat = ', '.join(str(x) for x in in_path.read_bytes())
+  out_path = pathlib.Path(options.output)
+  out_path.write_text(f"""// Copyright 2021 Google LLC. All Rights Reserved.
+
+#include <stdint.h>
+#include <stddef.h>
+namespace widevine {{
+
+extern const uint8_t k{options.variable}[];
+const uint8_t k{options.variable}[] = {{ {dat} }};
+
+extern const size_t k{options.variable}Size;
+const size_t k{options.variable}Size = sizeof(k{options.variable});
+
+}}  // namespace widevine""")