Enable the color lint check

We disabled color check because the error message was
ambiguous when the android environment hadn't been set
up.

Since the error mesage has been updated, we can turn it
back on.

Bug: 65850237
Test: repo upload .
Change-Id: I9517192b8b7d8131014e3ac44e3edb2d97134bb6

PREUPLOAD.cfg

@@ -1,4 +1,5 @@
 [Hook Scripts]
 checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
                   -fw src/com/android/settings/print/
+checkcolor_hook = ${REPO_ROOT}/prebuilts/checkcolor/checkcolor.py -p .