VLC's MMAL video output doesn't detect which HDMI port is connected, as `omxplayer` did beforehand.
This results in a black screen instead of a splash video/image on a Pi4 where the display is connected to the 2nd HDMI port. Use `tvservice` when the MMAL video output is used to detect the connected screen and pass it on to `vlc`.
Since we're using just the Bourne shell, had to use `case` for wildcard comparison.
Do note that `CMD_OPTS` is modified during the installation of splashscreen, so it's not 100% guaranteed to stay empty.
omxiv / omxplayer only works on the Raspberry Pi legacy and fkms drivers.
This change switches to vlc for both utilities, as it supports mmal output on the Raspberry Pi legacy drivers, and drm output on KMS on Raspberry Pi OS (bullseye).
Remove dependencies for omxplayer / omxiv / insserv
Switch code to use vlc.
Run asplashscreen as $user (not root).
Remove wait for dbus (no longer needed)
Save vlc pid and Exit vlc before launching emulationstation on KMS
Pin vlc version on Buster to version from archive.raspberrypi.org to stop it being overwritten with the vanilla Debian security release.
Enable on 64bit Raspberry Pi OS
EmulationStation, when using the RPI videodrivers, displays at layer 10000.
Increased the layer index for video/images in order to run above EmulationStation.
