add nativeapis

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/native-apis/_o_h_ext_data_handle.md

+# OHExtDataHandle
+
+
+## Overview
+
+Defines the extended data handle.
+
+**Related Modules:**
+
+[NativeWindow](_native_window.md)
+
+
+## Summary
+
+
+### Member Variables
+
+| Name | Description | 
+| -------- | -------- |
+| [fd](#fd) | File descriptor handle. The value **-1** indicates that the handle is not supported.  | 
+| [reserveInts](#reserveints) | Number of reserved arrays.  | 
+| [reserve](#reserve) [0] | Reserve array.  | 
+
+
+## Member Variable Description 
+
+
+### fd
+
+  
+```
+int32_t OHExtDataHandle::fd
+```
+**Description**<br>
+File descriptor handle. The value **-1** indicates that the handle is not supported.
+
+
+### reserve
+
+  
+```
+int32_t OHExtDataHandle::reserve[0]
+```
+**Description**<br>
+Reserve array.
+
+
+### reserveInts
+
+  
+```
+uint32_t OHExtDataHandle::reserveInts
+```
+**Description**<br>
+Number of reserved arrays.