point to new repo hooks for mainline uploads

Bug: 157501573
Test: upload
Change-Id: I6c597f289e4953b43cdbd683d633a90bd5bb9bc9

PREUPLOAD.cfg

diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 86b6de3..ecf8b8e 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,2 +1,2 @@
 [Hook Scripts]
-mainline_hook = ${REPO_ROOT}/frameworks/av/tools/mainline_hook.sh
+mainline_hook = ${REPO_ROOT}/frameworks/av/tools/mainline_hook_project.sh