Em /etc/grub.d/40_custom adicione:
menuentry "Android" {
insmod ext2
set root='(hd0,HERE NUMBER OF PARTITION WITH YOUR ANDROID)'
linux /android-4.0-RC1/kernel quiet root=/dev/ram0 androidboot.hardware=asus_laptop acpi_sleep=s3_bios,s3_mode SRC=/android-4.0-RC1
initrd /android-4.0-RC1/initrd.img}