!13149 Corrected the spelling errors of avsession documents

Merge pull request !13149 from Li Yuhang/fix_spell_0103

zh-cn/application-dev/media/avsession-guidelines.md

@@ -191,7 +191,7 @@ currentSession.on('playNext', () => {
    });
    console.log("调用AudioPlayer.play方法");
    // 设置播放状态
-   let time = (new Data()).getTime();
+   let time = (new Date()).getTime();
    currentSession.setAVPlaybackState({state: avSession.PlaybackState.PLAYBACK_STATE_PLAY, position: {elapsedTime: 0, updateTime: time}, bufferedTime:2000}).then(() => {
        console.info('setAVPlaybackState successfully');
    }).catch((err) => {
@@ -286,7 +286,7 @@ currentSession.off('outputDeviceChange');
 
 // 去激活session并销毁对象
 currentSession.deactivate().then(() => {
-   currentSession.destory();
+   currentSession.destroy();
 });
 ```