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

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

Change-Id: I52f1f082db0d574b47bb8abde2d054faa8700953