Do not overwrite activity theme after receive splash screen view.

From api 33[1], the polish transfer splash screen view action was move
to Shell, so there won't overwrite activity's theme after
setOnExitAnimationListener called.

[1]: Ibb353d350fa2921188c8c4b54f8e029ee3869c16

Bug: 331563980
Test: add enableEdgeToEdge in activity's onCreate, verify activity's
theme won't be affected by onExitAnimatinListener.

Change-Id: I10587b7ce8e859720de74952a8b227c1b9fc349c

• core/core-splashscreen/src/main/java/androidx/core/splashscreen/SplashScreen.kt[diff]
• core/core-splashscreen/src/main/java/androidx/core/splashscreen/SplashScreenViewProvider.kt[diff]