Mark apex-available am: 7c9a7bcf98

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/smallvec/+/3166942

Change-Id: Iea1e28f3908209204864eae3ce9eeca113ec8039
Signed-off-by: Automerger Merge Worker <[email protected]>