Bug fix in provider key verification (#644)

Author: preetha-intel

onnxruntime/core/providers/openvino/contexts.h

@@ -103,7 +103,7 @@ struct ProviderInfo {
   bool so_share_ep_contexts{false};        // ORT session option
   fs::path so_context_file_path{};         // ORT session option
   const ConfigOptions* config_options{NULL};
-  const std::unordered_set<std::string> valid_provider_keys = {"device_type", "device_id", "device_luid", "cache_dir",
+  const std::unordered_set<std::string> valid_provider_keys = {"device_type", "device_id", "device_luid", "cache_dir", "precision",
                                                                "load_config", "context", "num_of_threads", "model_priority", "num_streams", "enable_opencl_throttling", "enable_qdq_optimizer",
                                                                "disable_dynamic_shapes"};
 };