BACKPORT: CHROMIUM: esdfs: Fix lower ownership for OBB files

Gives the correct ownership to things under the obb folder.
They should be owned by AID_MEDIA_OBB.

BUG=b:110144407
TEST=Mount esdfs with multiuser, check ownership of files
     under the obb folder at the root of the lower mount
     location.

Change-Id: I5519780e50917e74293c0d0a6cd882fcf0f3cd0c
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1102108
Commit-Ready: Sarthak Kukreti <sarthakkukreti@chromium.org>
Tested-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
Reviewed-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
(cherry picked from commit 12c39d39ae96cb1a141fb8b777c4a6acecbc9675)
Reviewed-on: https://chromium-review.googlesource.com/1110495
Commit-Ready: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
4 files changed