Add Java API for non-streaming ASR (#807)

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

@@ -0,0 +1,55 @@
+// Copyright 2024 Xiaomi Corporation
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineTransducerModelConfig {
+    private final String encoder;
+    private final String decoder;
+    private final String joiner;
+
+    private OfflineTransducerModelConfig(Builder builder) {
+        this.encoder = builder.encoder;
+        this.decoder = builder.decoder;
+        this.joiner = builder.joiner;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public String getEncoder() {
+        return encoder;
+    }
+
+    public String getDecoder() {
+        return decoder;
+    }
+
+    public String getJoiner() {
+        return joiner;
+    }
+
+    public static class Builder {
+        private String encoder = "";
+        private String decoder = "";
+        private String joiner = "";
+
+        public OfflineTransducerModelConfig build() {
+            return new OfflineTransducerModelConfig(this);
+        }
+
+        public Builder setEncoder(String encoder) {
+            this.encoder = encoder;
+            return this;
+        }
+
+        public Builder setDecoder(String decoder) {
+            this.decoder = decoder;
+            return this;
+        }
+
+        public Builder setJoiner(String joiner) {
+            this.joiner = joiner;
+            return this;
+        }
+    }
+}