Fix clang-format lint and remove duplicate error code from message

ErrorHelper.formatMessage already prefixes the error code, so including
it in the details string was redundant.

This commit was authored with the help of Claude.

Author: psiddh

extension/android/jni/jni_layer_llama.cpp

@@ -598,19 +598,16 @@ class ExecuTorchLlmJni : public facebook::jni::HybridClass<ExecuTorchLlmJni> {
       std::stringstream ss;
       ss << "Model runner was not created. model_type_category="
          << model_type_category_
-         << ". Valid values: " << MODEL_TYPE_CATEGORY_LLM
-         << " (LLM), " << MODEL_TYPE_CATEGORY_MULTIMODAL << " (Multimodal)";
+         << ". Valid values: " << MODEL_TYPE_CATEGORY_LLM << " (LLM), "
+         << MODEL_TYPE_CATEGORY_MULTIMODAL << " (Multimodal)";
       executorch::jni_helper::throwExecutorchException(
           static_cast<uint32_t>(Error::InvalidState), ss.str().c_str());
       return static_cast<jint>(Error::InvalidState);
     }
     const auto load_result = static_cast<jint>(runner_->load());
     if (load_result != static_cast<jint>(Error::Ok)) {
-      std::stringstream ss;
-      ss << "Failed to load model runner [error code: 0x"
-         << std::hex << load_result << "]";
       executorch::jni_helper::throwExecutorchException(
-          static_cast<uint32_t>(load_result), ss.str().c_str());
+          static_cast<uint32_t>(load_result), "Failed to load model runner");
     }
     return load_result;
   }