Widevine MediaCas client code that works with Android R

protos/ca_descriptor.proto

@@ -0,0 +1,21 @@
+// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine Master
+// License Agreement.
+
+syntax = "proto2";
+
+package video_widevine;
+
+option optimize_for = LITE_RUNTIME;
+
+// Widevine private data in the CA descriptor.
+message CaDescriptorPrivateData {
+  // Provider name.
+  optional string provider = 1;
+
+  // Content ID.
+  optional bytes content_id = 2;
+
+  // Group ID indicates which group the content comes from.
+  optional bytes group_id = 3;
+}