[FCE-668] Fix Android icon and splash screen (#198)

## Description

Replaces old icons with new ones to fix display issues on Android as
well to add support for theming and adds svg assets in case future edits
are needed.

## Motivation and Context

Android icons and splash screen were not displayed correctly.

## Types of changes

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to
      not work as expected)

## Checklist:

- [ ] My code follows the code style of this project.
- [ ] My change requires a change to the documentation.
- [ ] I have updated the documentation accordingly.

## Screenshots (if appropriate)
![Simulator Screenshot - iPhone 16 Pro Max - 2024-10-23 at 12 00
35](https://github.com/user-attachments/assets/535ab94a-b885-4124-b10f-8138304032ce)

![Screenshot_20241023_120029](https://github.com/user-attachments/assets/ff337b80-fb0d-49ec-a115-490824021b07)

![Screenshot_20241023_120009](https://github.com/user-attachments/assets/4140f765-07bd-468f-a6db-23f0e5235817)

examples/fishjam-chat/app.json

@@ -23,6 +23,7 @@
     "android": {
       "adaptiveIcon": {
         "foregroundImage": "./assets/adaptive-icon.png",
+        "monochromeImage": "./assets/adaptive-icon.png",
         "backgroundColor": "#ffffff"
       },
       "package": "io.fishjam.example.fishjamchat",