Update docs against 15508

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

en/application-dev/application-models/js-apis-app-ability-serviceExtensionAbility.md

+# @ohos.app.ability.ServiceExtensionAbility (ServiceExtensionAbility)
+
+The **ServiceExtensionAbility** module provides APIs for ServiceExtensionAbilities.
+
+> **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 of this module can be used only in the stage model.
+
+## Modules to Import
+
+```ts
+import ServiceExtension from '@ohos.app.ability.ServiceExtensionAbility';
+```
+
+## Required Permissions
+
+None.
+
+## Attributes
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+| Name| Type| Readable| Writable| Description|
+| -------- | -------- | -------- | -------- | -------- |
+| context | [ServiceExtensionContext](js-apis-inner-application-serviceExtensionContext.md)  | Yes| No| ServiceExtensionContext, which is inherited from **ExtensionContext**.|
+
+
+## ServiceExtensionAbility.onCreate
+
+onCreate(want: Want): void;
+
+Called when a ServiceExtensionAbility is created to initialize the service logic.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| want |  [Want](js-apis-app-ability-want.md) | Yes| Want information related to this ServiceExtensionAbility, including the ability name and bundle name.|
+
+**Example**
+
+  ```ts
+  class ServiceExt extends ServiceExtension {
+    onCreate(want) {
+      console.log('onCreate, want:' + want.abilityName);
+    }
+  }
+  ```
+
+
+## ServiceExtensionAbility.onDestroy
+
+onDestroy(): void;
+
+Called when this ServiceExtensionAbility is destroyed to clear resources.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Example**
+
+  ```ts
+  class ServiceExt extends ServiceExtension {
+    onDestroy() {
+      console.log('onDestroy');
+    }
+  }
+  ```
+
+
+## ServiceExtensionAbility.onRequest
+
+onRequest(want: Want, startId: number): void;
+
+Called following **onCreate()** when a ServiceExtensionAbility is started by calling **startAbility()** or **startServiceExtensionAbility()**. The value of **startId** is incremented for each ability that is started.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| want |  [Want](js-apis-app-ability-want.md) | Yes| Want information related to this ServiceExtensionAbility, including the ability name and bundle name.|
+| startId | number | Yes| Number of ability start times. The initial value is **1**, and the value is automatically incremented for each ability started.|
+
+**Example**
+
+  ```ts
+  class ServiceExt extends ServiceExtension {
+    onRequest(want, startId) {
+      console.log('onRequest, want:' + want.abilityName);
+    }
+  }
+  ```
+
+
+## ServiceExtensionAbility.onConnect
+
+onConnect(want: Want): rpc.RemoteObject;
+
+Called following **onCreate()** when a ServiceExtensionAbility is started by calling **connectAbility()**. A **RemoteObject** object is returned for communication between the server and client.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| want |  [Want](js-apis-app-ability-want.md)| Yes| Want information related to this ServiceExtensionAbility, including the ability name and bundle name.|
+
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| rpc.RemoteObject | A **RemoteObject** object used for communication between the server and client.|
+
+**Example**
+
+  ```ts
+  import rpc from '@ohos.rpc';
+  class StubTest extends rpc.RemoteObject{
+      constructor(des) {
+          super(des);
+      }
+      onConnect(code, data, reply, option) {
+      }
+  }
+  class ServiceExt extends ServiceExtension {
+    onConnect(want) {
+      console.log('onConnect , want:' + want.abilityName);
+      return new StubTest('test');
+    }
+  }
+  ```
+
+
+## ServiceExtensionAbility.onDisconnect
+
+onDisconnect(want: Want): void;
+
+Called when this ServiceExtensionAbility is disconnected.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| want |[Want](js-apis-app-ability-want.md)| Yes| Want information related to this ServiceExtensionAbility, including the ability name and bundle name.|
+
+**Example**
+
+  ```ts
+  class ServiceExt extends ServiceExtension {
+    onDisconnect(want) {
+      console.log('onDisconnect, want:' + want.abilityName);
+    }
+  }
+  ```
+
+## ServiceExtensionAbility.onReconnect
+
+onReconnect(want: Want): void;
+
+Called when this ServiceExtensionAbility is reconnected.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| want |[Want](js-apis-app-ability-want.md)| Yes| Want information related to this ServiceExtensionAbility, including the ability name and bundle name.|
+
+**Example**
+
+  ```ts
+  class ServiceExt extends ServiceExtension {
+    onReconnect(want) {
+      console.log('onReconnect, want:' + want.abilityName);
+    }
+  }
+  ```
+
+## ServiceExtensionAbility.onConfigurationUpdate
+
+onConfigurationUpdate(newConfig: Configuration): void;
+
+Called when the configuration of this ServiceExtensionAbility is updated.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| newConfig | [Configuration](js-apis-app-ability-configuration.md) | Yes| New configuration.|
+
+**Example**
+    
+  ```ts
+  class ServiceExt extends ServiceExtension {
+      onConfigurationUpdate(config) {
+          console.log('onConfigurationUpdate, config:' + JSON.stringify(config));
+      }
+  }
+  ```
+
+## ServiceExtensionAbility.onDump
+
+onDump(params: Array\<string>): Array\<string>;
+
+Dumps the client information.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| params | Array\<string> | Yes| Parameters in the form of a command.|
+
+**Example**
+    
+  ```ts
+  class ServiceExt extends ServiceExtension {
+      onDump(params) {
+          console.log('dump, params:' + JSON.stringify(params));
+          return ['params'];
+      }
+  }
+  ```
+