Agora RTC Objective-C API Reference Refactor

Here is a list of all functions, variables, defines, enums, and typedefs with links to the files they belong to:

### - e -

- ENCRYPTION_ERROR_DATASTREAM_DECRYPTION_FAILURE : AgoraEnumerates.h
- ENCRYPTION_ERROR_DATASTREAM_ENCRYPTION_FAILURE : AgoraEnumerates.h
- ENCRYPTION_ERROR_DECRYPTION_FAILURE : AgoraEnumerates.h
- ENCRYPTION_ERROR_ENCRYPTION_FAILURE : AgoraEnumerates.h
- ENCRYPTION_ERROR_INTERNAL_FAILURE : AgoraEnumerates.h
- END_COMPARE : IAgoraRtcEngine.h