Generate apex_available from c2a instead of a patch am: 6ba66615eb am: 62f5f6ed35 am: 82a301e9f3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/url/+/1690050

Change-Id: I119a3509ef735cf205091f17af4733402aeb0dcf