Update the sample to show upstream demos to v9.3. The samples for flex
layout, scrolling and multilanguage have been removed upstream, so also
remove their respective LV_Z_* entry.
Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
Enable LVGL widgets demo within Zephyr. This demo requires additional
stack and heap space in order to execute correctly, so raise the stack
and heap size to enable it to run.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
