rm audiotrack Signed-off-by: x30034819 <xieyijun3@huawei.com>

Signed-off-by: Nx30034819 <xieyijun3@huawei.com>

zh-cn/release-notes/changelogs/OpenHarmony_4.0.9.3/changelogs-media.md

+# 媒体子系统ChangeLog
+
+## cl.media.1 播放功能接口变更
+
+删除音轨切换相关接口。
+
+**变更影响**
+
+删除音轨切换相关接口，相关接口不可使用。
+
+**关键的接口/组件变更**
+
+删除接口如下：
+
+| 类名           | 删除接口声明                                                 |
+| -------------- | ------------------------------------------------------------ |
+| Media.Core     | MD_KEY_LANGUAGE                                              |
+| Media.AVPlayer | selectTrack(index: number): void                             |
+| Media.AVPlayer | deselectTrack(index: number): void                           |
+| Media.AVPlayer | getCurrentTrack(trackType: MediaType, callback: AsyncCallback\<number>): void |
+| Media.AVPlayer | getCurrentTrack(trackType: MediaType): Promise\<number>      |
+| Media.AVPlayer | on(type: 'trackChange', callback: (index: number, isSelect: boolean) => void): void; |
+| Media.AVPlayer | off(type: 'trackChange'): void                               |
+