Merge "vold: fix write kbytes handling" am: 13a57d2a

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2507268



Change-Id: I0ea8d3eb6fe49612077a23b30a5fce5a7627a871
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>