Add Java API for audio tagging (#820)

sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/AudioEvent.java

@@ -0,0 +1,32 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class AudioEvent {
+    private String name = "";
+    private int index = 0;
+    private float prob = 0;
+
+    public AudioEvent(String name, int index, float prob) {
+        this.name = name;
+        this.index = index;
+        this.prob = prob;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getIndex() {
+        return index;
+    }
+
+    public float getProb() {
+        return prob;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("AudioEven(name=%s, index=%d, prob=%.3f)\n", name, index, prob);
+    }
+}