IssueTracker

Component used: core-splashscreen
Version used: 1.0.0-alpha02
Devices/Android versions reproduced on: Emulator Google Pixel 3a with Android 12

I'm currently trying to add a drawable-file with gradient-background (see drawable_file.png) as my splashscreen-background, but unfortunately there's no option to set a drawable via `windowSplashScreenBackground`, as only colors are accepted. As a workaround, I'm using `android:windowBackground` like you can see in following example:

`
<style name="Theme.App.Starting" parent="Theme.SplashScreen">
        <item name="android:windowBackground">@drawable/splash_background_gradient</item>
        <item name="windowSplashScreenAnimatedIcon">@drawable/splash_icon</item>
       .....
`

However, when I run the app on my emulator (Google Pixel 3a Android 12) the background is not gradient, but a mix of both defined gradient-colors (see app_screenshot.png). Could you take a look here?