Merge "Generate apex_available from c2a instead of a patch" am: dbf6b615c0 am: b094af202c am: 0aa588c4ef am: 92ae7dfed5 am: 07e811f5c6

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/futures-task/+/1688807

Change-Id: I8f055ed7e6024bafc9aa02d3c93c80c7d2798383