Make Bedstead AOSP first.

Test: upload
Bug: 217904700
Change-Id: I718e6f11701af436fba01ac116029555c8c2d3ab
diff --git a/common/device-side/bedstead/PREUPLOAD.cfg b/common/device-side/bedstead/PREUPLOAD.cfg
new file mode 100644
index 0000000..cfa6610
--- /dev/null
+++ b/common/device-side/bedstead/PREUPLOAD.cfg
@@ -0,0 +1,2 @@
+[Hook Scripts]
+bedstead = ${REPO_ROOT}/frameworks/base/tools/aosp/aosp_sha.sh ${PREUPLOAD_COMMIT} "."