Add Android demo for spoken language identification using Whisper multilingual models (#783)

sherpa-onnx/csrc/spoken-language-identification.h

@@ -7,6 +7,11 @@
 #include <memory>
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-stream.h"
 #include "sherpa-onnx/csrc/parse-options.h"
 
@@ -70,6 +75,11 @@ class SpokenLanguageIdentification {
   explicit SpokenLanguageIdentification(
       const SpokenLanguageIdentificationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  SpokenLanguageIdentification(
+      AAssetManager *mgr, const SpokenLanguageIdentificationConfig &config);
+#endif
+
   ~SpokenLanguageIdentification();
 
   // Create a stream to accept audio samples and compute features