add high resolution image options and decision logic

Boot-splash script currently determines screen resolution by running frecon
and then runs it again with a list of images in command line. This change adds
an option in frecon to pass two lists of images and frecon will make a decision
which one to use based on screen resoltion. Therefore the script will not
have run frecon to discover resolution and there will be one mode switch less at
boot time which should make it faster.

BUG=chromium:541780
TEST=run bootperf

Change-Id: Ia0fae7ea4ec7f96dcced4ba934a371db324f2f61
Signed-off-by: Dominik Behr <dbehr@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/305054
Reviewed-by: Ilja Friedel <ihf@chromium.org>
3 files changed