Don't use bubblewrap in snaps since those are already sandboxed
Check similar to the one used in https://gitlab.gnome.org/GNOME/libsecret/-/blob/master/libsecret/secret-backend.c#L156
Currently the cheese snap fails to generated thumbnails
GnomeDesktop-DEBUG: 16:43:18.965: Failed to launch script: bwrap: Can't read /proc/sys/kernel/overflowuid: Permission denied