[PM-24196] White Screen Appears When Launching

### Steps To Reproduce

1. Open Bitwarden
2. Appears between Bitwarden splash screen and unlock screen.

### Expected Result

If this is a intended behaviour change the color to dark when in dark mode.

Dark screen should appear.

### Actual Result

Currently it is white in dark mode.

### Screenshots or Videos

https://github.com/user-attachments/assets/9731c48a-7f22-4e38-883b-b5606043c3d7

### Additional Context

_No response_

### Build Version

2025.6.1

### What server are you connecting to?

US

### Self-host Server Version

_No response_

### Environment Details

- Device: Samsung A30
- OS Version: Android 11

### Issue Tracking Info

- [ ] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.