Comment 0 for bug 1869655

Add an Ubuntu splash logo to supplement the BGRT logo.

Since we now keep the BIOS logo (ACPI BGRT image) on screen and don't replace it with a blank purple screen, it lasts much longer in 20.04 than it did in 19.04. This removes some sense of boot progress in that long period while we wait for the kernel to start plymouth.

I suggest we need grub to display *something* once again. Because it's the longest part of the boot process on many machines and it feels a bit broken in 20.04. But since we're using the Plymouth 'bgrt' theme, grub would need to understand and integrate with the BIOS logo.