Generate apex_available from c2a instead of a patch am: 4f4e7e28e7 am: 2b7f7e3719 am: 67a59fb873 am: dcd7fa19f5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/itoa/+/1689105

Change-Id: Iee6de06cb0d914486e19f81bbdf0440c6c290824