GF-8479: modified Simple Picker Sample not to allow null string when creating picker control. Enyo-DCO-1.1-Signed-off-by: YoungMok Kim <ym1980.kim@lge.com>
GF-8479: modified Simple Picker Sample not to allow null string when creating picker control. Enyo-DCO-1.1-Signed-off-by: YoungMok Kim <ym1980.kim@lge.com>

mcanthony/moonstone,mcanthony/moonstone,enyojs/moonstone,mcanthony/moonstone