agl-compositor-init: Use no ordering for picking the last available drop in

agl-compositor-init: Use no ordering for picking the last available drop in

This renames agl-compositor.conf to 01-agl-compositor.conf to allow the
last available drop in to be used. Otherwise we risk this to be last one
available.

Bug-AGL: SPEC-5235
Change-Id: I8518fc17826dd9518dd62218c65639695c6e7eb4
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/30646
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>