Add Java API for speech enhancement GTCRN models (#2009)

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

@@ -0,0 +1,43 @@
+// Copyright 2025 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineSpeechDenoiser {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private long ptr = 0;
+
+    public OfflineSpeechDenoiser(OfflineSpeechDenoiserConfig config) {
+        ptr = newFromFile(config);
+    }
+
+    public int getSampleRate() {
+        return getSampleRate(ptr);
+    }
+
+    public DenoisedAudio run(float[] samples, int sampleRate) {
+        return run(ptr, samples, sampleRate);
+    }
+
+    protected void finalize() throws Throwable {
+        release();
+    }
+
+    public void release() {
+        if (this.ptr == 0) {
+            return;
+        }
+        delete(this.ptr);
+        this.ptr = 0;
+    }
+
+    private native void delete(long ptr);
+
+    private native int getSampleRate(long ptr);
+
+    private native DenoisedAudio run(long ptr, float[] samples, int sampleRate);
+
+    private native long newFromFile(OfflineSpeechDenoiserConfig config);
+}