#22247: Android: update "Clawdbot" branded app icon to match iOS app icon

## Summary - Replace the old launcher icon which still displayed the "Clawdbot" branding text — no longer appropriate for the app - Use the same lobster icon as the iOS app for consistent branding across platforms - Properly separate foreground (transparent lobster) and background (solid color) layers for adaptive icons on modern Android devices (API 26+), allowing the system to apply the correct mask shape per device/launcher - Legacy `ic_launcher.png` included at all densities for pre-API-26 devices ## Test plan - [ ] Verify the new icon appears correctly on the home screen and app drawer - [ ] Check adaptive icon rendering on API 26+ (round, squircle, etc.) - [ ] Verify legacy icon on pre-API-26 devices/emulators - [ ] Compare with iOS app icon for brand consistency 🤖 Generated with [Claude Code](https://claude.com/claude-code)