Point to the new checkstyle location for packages/apps/PackageInstaller PREUPLOAD hook.

This change depends on r.android.com/314437

Bug: 33666900
Test: None
Change-Id: I26e3b16b9b144ac2d66e068ccbf1b48058d241df
diff --git a/PermissionController/PREUPLOAD.cfg b/PermissionController/PREUPLOAD.cfg
index 2e4fa17..1a4ce24 100644
--- a/PermissionController/PREUPLOAD.cfg
+++ b/PermissionController/PREUPLOAD.cfg
@@ -3,5 +3,5 @@
 commit_msg_changeid_field = true
 
 [Hook Scripts]
-checkstyle_hook = ../../../development/tools/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
+checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}