Merge "Generate apex_available from c2a instead of a patch" am: c4379c47f7 am: c46660d000 am: ab28830577 am: 9bd447a748

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/once_cell/+/1689909

Change-Id: I50cfcf88da27913e4d7e74880cef05f85e1485ec