mobile: webrtc calls (#661)

* mobile: webrtc calls work on Android and iOS separately

* core: only send public key with offer if invitation/current call supports e2ee

* update npm module

src/Simplex/Chat/Call.hs

@@ -3,6 +3,7 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Simplex.Chat.Call where
@@ -99,6 +100,9 @@ data CallType = CallType
 defaultCallType :: CallType
 defaultCallType = CallType CMVideo $ CallCapabilities {encryption = True}
 
+encryptedCall :: CallType -> Bool
+encryptedCall CallType {capabilities = CallCapabilities {encryption}} = encryption
+
 instance ToJSON CallType where toEncoding = J.genericToEncoding J.defaultOptions
 
 -- | * Types for chat protocol