Only run ktlint preupload hook when there are changed kt(s) files

Fixes: 235079038
Test: Manual
Change-Id: Ia9957c6b896d0d1427dd9c24fc955a899d87e2cf

diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index f0ae583..619fe79 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg

@@ -1,6 +1,6 @@
 [Hook Scripts]
 checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT} -c ${REPO_ROOT}/frameworks/support/development/checkstyle/config/support-lib.xml -p development/checkstyle/prebuilt/com.android.support.checkstyle.jar
-ktlint_hook = ${REPO_ROOT}/frameworks/support/gradlew -q -p ${REPO_ROOT}/frameworks/support --continue :ktlintCheckFile --configuration-cache --file=${PREUPLOAD_FILES_PREFIXED}
+ktlint_hook = ${REPO_ROOT}/frameworks/support/development/ktlint.sh --file=${PREUPLOAD_FILES_PREFIXED}
 warn_check_api = ${REPO_ROOT}/frameworks/support/development/apilint.py -f ${PREUPLOAD_FILES}
 
 [Builtin Hooks]