Move the creation of the staging directory to odrefresh. am: c62d3a210b

Original change: https://android-review.googlesource.com/c/platform/art/+/2979531

Change-Id: Icebe49c1922f016e76a35e6dfea006e88ce2f203
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>