ui: Remove vb2ex_get_debug_info()

Since the UI code now lives in depthcharge, move vb2ex_get_debug_info()
to screens.c as a static function.

BUG=b:172339016
TEST=make unit-tests -j
TEST=make screenshot SCREEN=UI_SCREEN_DEBUG_INFO PAGE=0
TEST=make screenshot SCREEN=UI_SCREEN_DEBUG_INFO PAGE=1
TEST=make test-screenshot
TEST=emerge-corsola depthcharge
BRANCH=none

Change-Id: Ibe6cb2987e1e07a598d306c78ca4f927dac5902b
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/depthcharge/+/3611670
Reviewed-by: Hsuan Ting Chen <roccochen@chromium.org>
Commit-Queue: Hsuan Ting Chen <roccochen@chromium.org>
11 files changed