ITS: Modify test to check all colors.

Currently the test exits if any of the color fails from the list
and doesn't check the remaining colors.Modify to check all the
colors and fail at the end if any of the color fails from the
list.Also logging the rgb_means and variances scaled by 255 for
better readability.

bug: 195423771

Test: Ran test on local device and verified the logs.
Change-Id: I9a9427e216f2965ded2caa01412496501ddeb3ad
1 file changed