Whitelist stagedinstall/ and atomicinstall/ folders for checkstyle_hook

Test: added a violation, verified it was reported on preupload
Bug: 123740983
Change-Id: I7a8685f107b1fa8b04e3081d7580334c32a903dd
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index d85f067..2513993 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -25,5 +25,7 @@
                       tests/tests/view/
                       tests/tests/widget/
                       common/device-side/util/
+                      hostsidetests/stagedinstall/
+                      tests/tests/packageinstaller/atomicinstall/
 
 ktlint_hook = ${REPO_ROOT}/prebuilts/ktlint/ktlint.py -f ${PREUPLOAD_FILES}