add java wrapper suppport (#117)

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

@@ -0,0 +1,23 @@
+/*
+ * // Copyright 2022-2023 by zhaoming
+ */
+
+package com.k2fsa.sherpa.onnx;
+
+public class FeatureConfig {
+  private final int sampleRate;
+  private final int featureDim;
+
+  public FeatureConfig(int sampleRate, int featureDim) {
+    this.sampleRate = sampleRate;
+    this.featureDim = featureDim;
+  }
+
+  public int getSampleRate() {
+    return sampleRate;
+  }
+
+  public int getFeatureDim() {
+    return featureDim;
+  }
+}