I compiled your B4A-Bridge and it displays ok with 4.3 Jellybean. I then took your mipmap folder and also the Drawable folder and added to my project and it fails to display the icon properly. it just shows blank white background. My manifest is same as yours and i have your mipmap and drawable folder. Why is it doing this?
Update: Probably related to Emulator. I added 2 same icons and 1 of them displayed ok while other is blank white.