Merge "storageproxy: Report fsync failures with a distinct error code" am: 67d70ffe

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2169947



Change-Id: Id1bad4a11fa19c96462f154ac7fbb41ca4e020f8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>