Add OWNERS and fix METADATA file. am: 5403d046c0 am: 1a019f6318 am: 638ff63403 am: c9e4ae2e45 am: 1fcf866a59

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/remove_dir_all/+/1888779

Change-Id: I3b4a67124814b34d224e9ef850e722ced0eea416