gstreamer1.0-plugins-bad_%.bbappend: Added a title/appid

gstreamer1.0-plugins-bad_%.bbappend: Added a title/appid

This is necessary to display gst-launch application which uses its own
xdg-shell toplevel window. Any other application that creates its own
toplevel window would *not* have this problem.

There's a patch specific for rcar-gen3, as they have their own gstreamer
fork.

Bug-AGL: SPEC-4870
Change-Id: Ic899d9c5518a50bb426237775f54c8bf34474cc9
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/29115
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
ci-image-boot-test: Jenkins Job builder account