Generate apex_available from c2a instead of a patch am: d00e1ff9c4 am: f5d829f250 am: caf840c5c9

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/spin/+/1689918

Change-Id: I85ff13a24dba5252b135f19bee7019bdb664dcb7