Migrate to SDK 30

[seanwu1105]

After the 1.5.0 core package in AndroidX has released,

• [ ] replace view.systemUiVisibility and View.SYSTEM_UI_FLAG_* APIs with the new window.setDecorFitsSystemWindows API.
• [ ] replace insets.systemWindowInset* APIs with the new WindowInsetsCompat APIs.

[seanwu1105]

@tammyyang Google has NOT released the core.view package of AndroidX library to deal with compatibility issue at the moment. Thus, I think we should postpone this one to next sprint.