First of all, Thanks for this great discovery.
Building on your guide, I managed to change the default launcher by WallPanel
- Install the APK: adb -e install wallpanel_0.9.5.7.apk
- Go to home to select the new installed launcher: am start -c android.intent.category.HOME -a android.intent.action.MAIN
- Configure WallPanel.
- Disable Hardware Acceleration in Wallpanel to get lovelace fully loaded.
This is the result.
