Bug 1631193 - drop Wayland permissions from flatpak r=mtabara

Firefox still does not default to Wayland when it's available (or when
X11 socket is not accessible). This can be changed by MOZ_ENABLE_WAYLAND=1
but as it's not the default, it's safer to just drop access to Wayland.

Differential Revision: https://phabricator.services.mozilla.com/D71448

taskcluster/docker/firefox-flatpak/runme.sh

@@ -138,12 +138,11 @@ install -D -m755 launch-script.sh "${appdir}/bin/firefox"
 
 flatpak build-finish build                                      \
         --share=ipc                                             \
-        --socket=wayland                                        \
-        --socket=fallback-x11                                   \
-        --require-version=1.0.0                                 \
         --share=network                                         \
         --socket=pulseaudio                                     \
+        --socket=x11                                            \
         --socket=pcsc                                           \
+        --require-version=0.11.1                                \
         --persist=.mozilla                                      \
         --filesystem=xdg-download:rw                            \
         --device=all                                            \