fix: MetadataReceived event parameters bug

Author: LichKing-2234

Callback.kt

@@ -5,7 +5,7 @@ import io.agora.rtc.RtcEngine
 import kotlin.math.abs
 
 abstract class Callback {
-  fun code(code: Int?, runnable: ((Int) -> Any?)? = null) {
+  fun code(code: Int?, runnable: ((Int?) -> Any?)? = null) {
     if (code == null || code < 0) {
       val newCode = abs(code ?: Constants.ERR_NOT_INITIALIZED)
       failure(newCode.toString(), RtcEngine.getErrorDescription(newCode))

MediaObserver.kt

@@ -32,9 +32,7 @@ class MediaObserver(
 
   override fun onMetadataReceived(buffer: ByteArray, uid: Int, timeStampMs: Long) {
     emit(hashMapOf(
-      "buffer" to String(buffer),
-      "uid" to uid,
-      "timeStampMs" to timeStampMs
+      "data" to arrayListOf(String(buffer), uid, timeStampMs)
     ))
   }
 }