The translucent property of the DropdownAlert component does not take effect and does not show the effect of translucent status bar, which is the same as Android

[Panlichen1996]

DropdownAlert 组件的 translucent 属性不生效，没有显示出状态栏半透明的效果，与 Android 一致
复现问题的demo：

alertProps: {
        updateStatusBar: true,
        translucent: true,
        activeStatusBarBackgroundColor: '#483D8B',
      }