Use Kotlin StateFlow in place of LiveData

[zhanghai]

https://developer.android.com/kotlin/flow/stateflow-and-sharedflow

https://developer.android.com/kotlin/coroutines/coroutines-best-practices

[kineita]

Hi zhanghai, I am curious about benefit of switching from LiveData to StaeFlow. In my research,, SateFlow allow you to send multipl times. Thank you so much.