Prepare necessary data directory before loading persistent properties.

init reads files in /data/property/ but it is not ready to read when
trigger_load_persist_props is triggered by vold.decrypt.

Bug: 29332975
Change-Id: I14beac8714ff2f722d8b11f666bc7ca693ccd46e
(cherry picked from commit e2ef0c0da454a5b9224d340260e9ad5be46092fe)
1 file changed