Generate apex_available from c2a instead of a patch am: 798c708a18 am: 0a01c5a1c8

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/idna/+/1688778

Change-Id: I61fa43e2b0d9a270914efc8e9d6ec88aeadbc71c