qemu[arm,arm64]: enable runqemu in graphic mode

qemu[arm,arm64]: enable runqemu in graphic mode

This adds the necessary flags to launch runqemu for the qemuarm target with the full
graphical agl-demo-platform image.
Slow but working.

Bug-AGL: SPEC-3764

Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Change-Id: Iffc2158e53d775d578b1d4ee0e94d3fd68e2a028
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/25930
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Scott Murray <scott.murray@konsulko.com>