Add build script for Android armv8a (#58)

sherpa-onnx/csrc/online-transducer-model.h

@@ -8,6 +8,11 @@
 #include <utility>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "onnxruntime_cxx_api.h"  // NOLINT
 #include "sherpa-onnx/csrc/online-transducer-model-config.h"
 
@@ -22,6 +27,11 @@ class OnlineTransducerModel {
   static std::unique_ptr<OnlineTransducerModel> Create(
       const OnlineTransducerModelConfig &config);
 
+#if __ANDROID_API__ >= 9
+  static std::unique_ptr<OnlineTransducerModel> Create(
+      AAssetManager *mgr, const OnlineTransducerModelConfig &config);
+#endif
+
   /** Stack a list of individual states into a batch.
    *
    * It is the inverse operation of `UnStackStates`.