Regular sync.

Changes include:
1. Fix refreshkeys when handling renewal response.
2. Change ECM start detect method.
3. Fix signing key truncation.
4. Reformat C++ code.
5. Return license_id in LICENSE_CAS_READY payload.
6. Expose OEMCrypto API version in the license request.
7. Add support for newly added widevine cas ids.
8. Store content iv and encryption mode info to entitled key.
9. Upgrade ODK library to 16.4.

protos/ca_descriptor.proto

@@ -15,7 +15,4 @@ message CaDescriptorPrivateData {
 
   // Content ID.
   optional bytes content_id = 2;
-
-  // Group ID indicates which group the content comes from.
-  optional bytes group_id = 3;
 }