Generate apex_available from c2a instead of a patch am: 1a7271af62 am: 2985289ffb am: f4a1f02f91 am: 4eafa0cc0e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pin-project/+/1688682

Change-Id: I2f6bd9cfd42b823b7e0bd1f9c67592f21fd2293d