Android 12.1.0 release 26
Generate apex_available from c2a instead of a patch am: 6e21a92345 am: b9ecefff4f am: 33e398951a am: 714e5c0e39

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures/+/1688688

Change-Id: Iab345d96de3d0af840b64568879c62b7bfc842d7