Added style check presubmit check

Added style check presubmit check for the uploading CL.

Test: Build
Change-Id: I922038d0f1839e05a51d5fd1095bfb99e1a55794
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..f3db20e
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,2 @@
+[Hook Scripts]
+checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}