Update.

Author: cloudwebrtc

android/src/main/java/com/cloudwebrtc/webrtc/utils/ConstraintsArray.java

@@ -102,6 +102,10 @@ public void pushArray(ConstraintsArray array){
         mArray.add(array.toArrayList());
     }
 
+    public void pushByte(byte[] value){
+        mArray.add(value);
+    }
+
     public void pushMap(ConstraintsMap map){
         mArray.add(map.toMap());
     }

lib/rtc_data_channel.dart

@@ -58,8 +58,7 @@ class RTCDataChannelMessage {
     this._data = binary;
     this._isBinary = true;
   }
-
-
+  
   /// Tells whether this message contains binary.
   /// If this is false, it's a text message.
   bool get isBinary => _isBinary;