Re-enable bpfmt as a pre-upload check.

Bug: http://b/339424309
Test: treehugger
Change-Id: Ib6c90ab98cdf406ff2fd3231c3e0ea8baa940693
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 1587320..923420b 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,2 +1,5 @@
 [Hook Scripts]
 check = ${REPO_ROOT}/external/rust/android-crates-io/PREUPLOAD.sh ${PREUPLOAD_FILES}
+
+[Builtin Hooks]
+bpfmt = true