Embed build number in non-apex build

Bug: 316978205
Test: m android.hardware.drm-service.widevine
Change-Id: Ibf77a0135fa832424f38619bdd2df0ccc53f5849

libwvdrmengine/wv-android-build-id-gen.py

@@ -0,0 +1,27 @@
+import argparse
+import datetime
+import json
+import sys
+
+if __name__ == "__main__":
+
+    description = 'APEX Manifest JSON (stdin) to C++ header (stdout)'
+    parser = argparse.ArgumentParser(description=description)
+    parser.add_argument('--guard', type=str,
+                        default='WVCDM_WV_ANDROID_BUILD_ID_H_',
+                        help='Include guard')
+    args = parser.parse_args()
+
+    apex_manifest = json.load(sys.stdin)
+    output = f'''\
+// Copyright {datetime.date.today().year} Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine License
+// Agreement.
+//
+#ifndef {args.guard}
+#define {args.guard}
+
+#define WV_ANDROID_BUILD_ID "{apex_manifest['version']}"
+
+#endif  // {args.guard}'''
+    print(output)