Android Oreo (API 2) doesn't show proper Splash Screen

## Bug Report

### Plugin(s)

`"@capacitor/splash-screen": "^5.0.6"`
`"@capacitor/assets": "^3.0.1"`

### Capacitor Version

```
Latest Dependencies:

@capacitor/cli: 5.4.1
@capacitor/core: 5.4.1
@capacitor/android: 5.4.1
@capacitor/ios: 5.4.1

Installed Dependencies:

@capacitor/ios: not installed
@capacitor/cli: 5.3.0
@capacitor/android: 5.3.0
@capacitor/core: 5.3.0

[success] Android looking great! 👌
```

### Platform(s)

Android

### Current Behavior

I already did `npx @capacitor/assets generate --android --assetPath /public/media/generate` and some assets were generated, however when using Android Oreo (API 26), the splash screen didn't show properly

### Expected Behavior

Show my custom splash screen and not default Android logo