Fixed spell problems

Signed-off-by: Nliyuhang <liyuhang24@huawei.com>
Change-Id: Iabcc503331e288100ee00fea0fc5ab94c9b1114a

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

@@ -187,7 +187,7 @@ 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) => {
@@ -282,7 +282,7 @@ currentSession.off('outputDeviceChange');
 
 // 去激活session并销毁对象
 currentSession.deactivate().then(() => {
-   currentSession.destory();
+   currentSession.destroy();
 });
 ```