原库描述：Modal only: The theme of the modal. "light", "dark", "auto". Defaults to "auto". 不支持原因：HarmonyOS中[TimePicker](https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V3/ts-basic-components-timepicker-0000001281480698-V3)、[TimePickerDialog](https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-methods-timepicker-dialog-V5)、[DatePickerDialog](https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/ts-methods-datepicker-dialog-V5)组件均不支持此属性。
原库描述：Modal only: The theme of the modal. "light", "dark", "auto". Defaults to "auto".
不支持原因：HarmonyOS中TimePicker、TimePickerDialog、DatePickerDialog组件均不支持此属性。