Automatically power on Android when the charger is connected
The battery charging graphic is displayed by /system/bin/playlpm file on Samsung devices.

If you are root, you can edit this file to:

#!/system/bin/sh
/system/bin/reboot


And be sure to add those permissions to the file:

chmod 0755 /system/bin/playlpm
chown root.shell /system/bin/playlpm


Your device will now boot when plugged