Failed to build QNN AAR Library due to data_files_vector

[luffy-yu]

This is due to the code in executorch/extension/android/jni/jni_layer_llama.cpp.

The following shows the fix.

diff --git a/extension/android/jni/jni_layer_llama.cpp b/extension/android/jni/jni_layer_llama.cpp
index 25873a788b..1334189d3b 100644
--- a/extension/android/jni/jni_layer_llama.cpp
+++ b/extension/android/jni/jni_layer_llama.cpp
@@ -169,12 +169,12 @@ class ExecuTorchLlmJni : public facebook::jni::HybridClass<ExecuTorchLlmJni> {
 #endif
 
     model_type_category_ = model_type_category;
+    std::vector<std::string> data_files_vector;
     if (model_type_category == MODEL_TYPE_CATEGORY_MULTIMODAL) {
       multi_modal_runner_ = llm::create_multimodal_runner(
           model_path->toStdString().c_str(),
           llm::load_tokenizer(tokenizer_path->toStdString()));
     } else if (model_type_category == MODEL_TYPE_CATEGORY_LLM) {
-      std::vector<std::string> data_files_vector;
       if (data_files != nullptr) {
         // Convert Java List<String> to C++ std::vector<string>
         auto list_class = facebook::jni::findClassStatic("java/util/List");
@@ -207,7 +207,8 @@ class ExecuTorchLlmJni : public facebook::jni::HybridClass<ExecuTorchLlmJni> {
           decoder_model.c_str(),
           model_path->toStdString().c_str(),
           tokenizer_path->toStdString().c_str(),
-          "");
+          "",
+	  "");
       model_type_category_ = MODEL_TYPE_CATEGORY_LLM;
 #endif
 #if defined(EXECUTORCH_BUILD_MEDIATEK)