Add bpfmt to upload hook

It's a nice reminder to format the Android.bp files.

Test: na
Bug: na
Change-Id: I94ce71b4a76556a013670f44e8cabdd391a4ea8b
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 213c93a..18b0a1b 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -3,3 +3,4 @@
 
 [Builtin Hooks]
 clang_format = true
+bpfmt = true