agl-ivi-demo-platform-flutter: add camera-gstreamer

agl-ivi-demo-platform-flutter: add camera-gstreamer

Add camera-gstreamer application to the new default Flutter demo image.

Bug-AGL: SPEC-5066

Change-Id: Idfb27610ddf75ff10bc3aea881a377ff70229217
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl-demo/+/29704
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Marius Vlad <marius.vlad@collabora.com>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
(cherry picked from commit f950cfabb008700cfa6bfe88286006a6cc20327e)
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl-demo/+/29763