Add doc (12175)

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/reference/errorcodes/errorcode-screenlock.md

+# Screen Lock Management Error Codes
+
+## 13200002 Screen Lock Management Service Is Abnormal
+
+**Error Message**
+
+The screenlock management service is abnormal.
+
+**Description**
+
+This error code is reported when the screen lock management service is not working correctly.
+
+**Possible Causes**
+
+
+1. The service stops running due to unknown errors and is not automatically restored.
+2. The service is running but does not respond due to unknown errors.
+
+**Solution**
+
+Run the **ps -ef** command to check whether the service is running.
+
+1. If the service is not running, restart the system.
+2. If the service is running, close the service process and wait for automatic recovery. If the issue persists, perform step 1.