Generate apex_available from c2a instead of a patch am: 90e6ca2b7e am: 060f57b2b4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pin-utils/+/1689913

Change-Id: I57c06b242ce4e218ec67082585c5e9d2c8e12b33