fixed f1bde163 from https://gitee.com/wusongqing/docs/pulls/19255

Update docs against 18923+18909

Signed-off-by: wusongqing<wusongqing@huawei.com>

en/application-dev/device-usage-statistics/device-usage-statistics-use-guide.md

-# Device Usage Statistics Development (API Version 9)
+# Device Usage Statistics Development
 
 ## When to Use
 

en/application-dev/reference/apis/js-apis-camera.md

@@ -2,8 +2,7 @@
 
 > **NOTE**
 >
-> - The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
-> - The APIs provided by this module are system APIs.
+> The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 ## Modules to Import
 
@@ -118,8 +117,9 @@ Enumerates the camera error codes, which are returned when an API call is incorr
 | SESSION_NOT_RUNNING        | 7400104    | The session is not running.   |
 | SESSION_CONFIG_LOCKED      | 7400105    | The session configuration is locked.    |
 | DEVICE_SETTING_LOCKED      | 7400106    | The device setting is locked.    |
-| CONFILICT_CAMERA  | 7400107    | The device is already started.    |
+| CONFLICT_CAMERA            | 7400107    | The device is already started.    |
 | DEVICE_DISABLED            | 7400108    | The camera is disabled for security reasons.    |
+| DEVICE_PREEMPTED           | 7400109    | The camera is preempted.    |
 | SERVICE_FATAL_ERROR        | 7400201    | An error occurs in the camera service.    |
 
 ## CameraManager
@@ -203,7 +203,7 @@ isCameraMuteSupported(): boolean
 
 Checks whether the camera can be muted.
 
-This is a system API.
+**System API**: This is a system API.
 
 **System capability**: SystemCapability.Multimedia.Camera.Core
 
@@ -225,7 +225,7 @@ muteCamera(mute: boolean): void
 
 Mutes or unmutes the camera.
 
-This is a system API.
+**System API**: This is a system API.
 
 **System capability**: SystemCapability.Multimedia.Camera.Core
 
@@ -562,7 +562,7 @@ on(type: 'cameraMute', callback: AsyncCallback\<boolean\>): void
 
 Listens for camera mute status changes. This API uses an asynchronous callback to return the result.
 
-This is a system API.
+**System API**: This is a system API.
 
 **System capability**: SystemCapability.Multimedia.Camera.Core
 
@@ -630,6 +630,20 @@ Enumerates the camera connection types.
 | CAMERA_CONNECTION_USB_PLUGIN | 1    | Camera connected using USB.|
 | CAMERA_CONNECTION_REMOTE     | 2    | Remote camera.|
 
+## HostDeviceType
+
+Enumerates the remote camera types.
+
+**System API**: This is a system API.
+
+**System capability**: SystemCapability.Multimedia.Camera.Core
+
+| Name                         | Value      | Description          |
+| ---------------------------- | ----     | ------------- |
+| UNKNOWN_TYPE                 | 0        | Unknown type.     |
+| PHONE                        | 0x0E     | Camera of a smartphone.|
+| TABLET                       | 0x11     | Camera of a tablet.|
+
 ## CameraDevice
 
 Defines the camera device information.
@@ -642,6 +656,8 @@ Defines the camera device information.
 | cameraPosition | [CameraPosition](#cameraposition) | Yes  | Camera position.   |
 | cameraType     | [CameraType](#cameratype)         | Yes  | Camera type.   |
 | connectionType | [ConnectionType](#connectiontype) | Yes  | Camera connection type.|
+| hostDeviceName | string                            | Yes  | Name of the remote device.<br>**System API**: This is a system API.|
+| hostDeviceType | [hostDeviceType](#hostdevicetype) | Yes  | Type of the remote device.<br>**System API**: This is a system API.|
 
 ## Size
 
@@ -1754,7 +1770,7 @@ Before the setting, you are advised to use **[getExposureBiasRange](#getexposure
 
 | Name    | Type                           | Mandatory| Description                |
 | -------- | -------------------------------| ---- | ------------------- |
-| exposureBias   | number                   | Yes  | EV. The supported EV range can be obtained by calling **getExposureBiasRange**. If calling the API fails, an error code defined in [CameraErrorCode](#cameraerrorcode) will be returned. If the value passed is not within the supported range, the nearest critical point is used.|
+| exposureBias   | number                   | Yes  | EV. The supported EV range can be obtained by calling **getExposureBiasRange**. If the value passed is not within the supported range, the nearest critical point is used. There is a step for EV. For example, if the step is 0.5 and this parameter is set to 1.2, the EV that takes effect is 1.0. If the operation fails, an error code defined in [CameraErrorCode](#cameraerrorcode) is returned. |
 
 **Error codes**
 
@@ -1788,7 +1804,7 @@ Obtains the exposure value in use.
 
 | Type       | Description                         |
 | ---------- | ----------------------------- |
-| number    | Exposure value obtained. If the operation fails, an error code defined in [CameraErrorCode](#cameraerrorcode) is returned.|
+| number    | Exposure value obtained. There is a step for EV. For example, if the step is 0.5 and this parameter is set to 1.2, the EV that takes effect is 1.0. If the operation fails, an error code defined in [CameraErrorCode](#cameraerrorcode) is returned. |
 
 **Error codes**