Make indexmap available to product and vendor am: 53485017b0 am: be5751a556 am: a4b6a1a453 am: e969481db9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/indexmap/+/2474365

Change-Id: Ic6143a8d755885228ba3c7ec29fa1f55902739d9
Signed-off-by: Automerger Merge Worker <[email protected]>