detachables: Adding language selection menu
detachables: Adding language selection menu

Handle displaying of language menu.

BUG=b:35585623
BRANCH=None
TEST=Reboot and select Language from menu, select language
     and make sure displays menu items in current language.

Change-Id: I518021c5278895e95cb4afdde044091c5bec7233
Signed-off-by: Shelley Chen <ab7b8cc85923339aed379eb1c5cc4dccfd2eb3d7@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/477093
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot