APK Name & Icon Modification

I need a quick modification of my Android APK's name and icon. The source code is available on GitHub.

Key Requirements:
- Change the APK's icon and name
- Create a demo account with an ID and password

Please note:
- The specific type of icon design (flat, 3D, minimalist) is not predetermined
- I have not specified a new name for the app, so part of the job could include brainstorming suggestions
- The demo account's access level is not yet decided, but it should be suitable for showcasing the app's capabilities

Ideal Skills:
- Experience in Android app development
- Proficiency in modifying APK files
- Familiarity with GitHub
- Creative input for naming and designing the icon