device/bluetooth: Add a helper function to BluetoothServiceRecordBlueZ

device/bluetooth/bluez/bluetooth_service_record_bluez.cc

Index: device/bluetooth/bluez/bluetooth_service_record_bluez.cc
diff --git a/device/bluetooth/bluez/bluetooth_service_record_bluez.cc b/device/bluetooth/bluez/bluetooth_service_record_bluez.cc
index 262e4e1c3254c2305397df6c91e110adee555ab2..e039d25520a0c0f0b008807eb489e379398cfbd8 100644
--- a/device/bluetooth/bluez/bluetooth_service_record_bluez.cc
+++ b/device/bluetooth/bluez/bluetooth_service_record_bluez.cc
@@ -45,4 +45,8 @@ void BluetoothServiceRecordBlueZ::AddRecordEntry(
       std::pair<uint16_t, BluetoothServiceAttributeValueBlueZ>(id, value));
 }
 
+bool BluetoothServiceRecordBlueZ::IsAttributePresented(uint16_t id) {
+  return attributes_.find(id) != attributes_.end();
+}
+
 }  // namespace bluez