bump back to protocol 6 for next release

@@ -560,7 +560,7 @@ constructor(
         const val SD_TYPE_ANSWER = "answer"
         const val SD_TYPE_OFFER = "offer"
         const val SD_TYPE_PRANSWER = "pranswer"
-        const val PROTOCOL_VERSION = 5
+        const val PROTOCOL_VERSION = 6
         const val SDK_TYPE = "android"
 
         private fun iceServer(url: String) =

@@ -9,7 +9,7 @@ internal fun getClientInfo() = with(LivekitModels.ClientInfo.newBuilder()) {
     sdk = LivekitModels.ClientInfo.SDK.ANDROID
     protocol = SignalClient.PROTOCOL_VERSION
     version = BuildConfig.VERSION_NAME
-    os = "android"
+    os = SignalClient.SDK_TYPE
     osVersion = Build.VERSION.RELEASE ?: ""
 
     val vendor = Build.MANUFACTURER ?: ""