update kotlin api for better release native object and add user-friendly apis. (#1275)

sherpa-onnx/kotlin-api/OnlineStream.kt

@@ -15,10 +15,19 @@ class OnlineStream(var ptr: Long = 0) {
 
     fun release() = finalize()
 
+    fun use(block: (OnlineStream) -> Unit) {
+        try {
+            block(this)
+        } finally {
+            release()
+        }
+    }
+
     private external fun acceptWaveform(ptr: Long, samples: FloatArray, sampleRate: Int)
     private external fun inputFinished(ptr: Long)
     private external fun delete(ptr: Long)
 
+
     companion object {
         init {
             System.loadLibrary("sherpa-onnx-jni")