Add CTC HLG decoding for JNI (#810)

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

@@ -0,0 +1,43 @@
+// Copyright 2024 Xiaomi Corporation
+package com.k2fsa.sherpa.onnx;
+
+public class OnlineCtcFstDecoderConfig {
+    private final String graph;
+    private final int maxActive;
+
+    private OnlineCtcFstDecoderConfig(Builder builder) {
+        this.graph = builder.graph;
+        this.maxActive = builder.maxActive;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public String getGraph() {
+        return graph;
+    }
+
+    public float getMaxActive() {
+        return maxActive;
+    }
+
+    public static class Builder {
+        private String graph = "";
+        private int maxActive = 3000;
+
+        public OnlineCtcFstDecoderConfig build() {
+            return new OnlineCtcFstDecoderConfig(this);
+        }
+
+        public Builder setGraph(String model) {
+            this.graph = graph;
+            return this;
+        }
+
+        public Builder setMaxActive(int maxActive) {
+            this.maxActive = maxActive;
+            return this;
+        }
+    }
+}