[功能请求] 修改手动保存图片的默认路径

### QQ(TIM)版本/QQ(TIM) Version

QQ极速版4.0.4

### 为什么你认为需要此功能

QQ默认的图片保存路径一般是/storage/emulated/0/tencent/QQ_Images，文件清理以及备份图片很不方便，且android也有专门用于保存图片的路径/storage/emulated/0/Pictures

### 联系到哪些已经存在的bug或者功能

_No response_

### 具体功能需要/Specific features require

增加自定义路径选项

No file or test is named. Start by locating the Android flow for manually saving images and the code that selects the current QQ_Images path. Done means users can configure a destination for manual image saves, with the configured path used instead of the default; add or update coverage if the project has tests for this flow.

Written by the indexing model from the issue text.