Added in API level 31

android.window

Interfaces

OnBackAnimationCallback Interface for applications to register back animation callbacks along their custom back handling. 
OnBackInvokedCallback Callback allowing applications to handle back events in place of the system. 
OnBackInvokedDispatcher Dispatcher to register OnBackInvokedCallback instances for handling back invocations. 
SplashScreen The interface that apps use to talk to the splash screen. 
SplashScreen.OnExitAnimationListener Listens for the splash screen exit event. 

Classes

BackEvent Object used to report back gesture progress. 
SplashScreenView

The view which allows an activity to customize its splash screen exit animation. 

SurfaceSyncGroup A way for data to be gathered so multiple surfaces can be synced.