Add metadata files am: d32c0a5db6 am: 33c71746a8 am: 2d73a1ce0d am: bad093c151

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/smallvec/+/1374114

Change-Id: Iaccadf440b9199501d39eb7a8bb2ab13c4707869