Implement MoveEntry on SmbFileSystem

This change implements MoveEntry on SmbFileSystem, allowing
files to be moved on Samba shares via the Files App.

TEST=compiles
BUG=chromium:757625

Change-Id: Id7c34a10360165e3aa7b0ea51b710283f564d54a
Reviewed-on: https://chromium-review.googlesource.com/923115
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537996}
1 file changed