Add AOSP preupload hook.

Test: repo upload in internal master
Change-Id: I8c3604dfa2701d2d82bc60d62562a65a62d7e05e

Author: enh-google

PREUPLOAD.cfg

@@ -1,8 +1,9 @@
-[Hook Scripts]
-notice = tools/update_notice.sh
-
 [Builtin Hooks]
 clang_format = true
 
 [Builtin Hooks Options]
 clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp
+
+[Hook Scripts]
+aosp_hook = ${REPO_ROOT}/frameworks/base/tools/aosp/aosp_sha.sh ${PREUPLOAD_COMMIT} "."
+notice = tools/update_notice.sh