Enable 11-lcdfilter-default.conf by default

Some applications needs this enabled by default on non-GNOME desktops.

reference: https://bugzilla.redhat.com/show_bug.cgi?id=1965684
11 jobs for lcdfilter-default in 7 minutes and 43 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Build
passed meson android arm64 fedora #11973636

00:01:30

passed meson macos #11973634
gst-macos-10.15

00:03:05

passed meson-mingw-w64-build #11973631

00:03:28

manual meson msys2 #11973635
docker windows 1809 allowed to fail manual
passed meson-shared-build #11973629

00:05:47

passed meson-static-build #11973630

00:06:09

passed meson vs2017 amd64 #11973632
docker windows 1809

00:01:12

passed meson vs2017 x86 #11973633
docker windows 1809

00:01:12

passed mingw-build #11973628

00:04:46

passed shared-build #11973626

00:07:42

passed static-build #11973627

00:06:13