Added SystemUI to checkstyle whitelist

Test: Using bogus CL with changes to upload
Fixes: 117599474
Change-Id: I1b69e04160dfee402622187991f5c58ead439754
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index ff40f75..5c21221 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -5,6 +5,7 @@
                       packages/PrintRecommendationService/
                       packages/PrintSpooler/
                       packages/PackageInstaller/
+                      packages/SystemUI/
                       services/print/
                       services/usb/
                       telephony/