ANDROID: add OWNERS for sysfs-fs-f2fs

This was generated with
$ build/synchronize_owners common-mainline/ android-mainline common12-5.10/

Bug: 181986413
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: I1416402cc4e100b950473d9a0277c34f78857638

Documentation/ABI/testing/OWNERS

+# include OWNERS from the authoritative android-mainline branch
+include kernel/common:android-mainline:/Documentation/ABI/testing/OWNERS