Make cfg-if available to product and vendor am: 844c47fc04 am: 6370d7a002 am: 3a308fd779 am: 443be155c4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/cfg-if/+/2475715

Change-Id: I2cfa442f3caefe90b8035cfac50b4affb47a5758
Signed-off-by: Automerger Merge Worker <[email protected]>