Fix incorrect cargo2android.py invocation. am: efb74b1650 am: 8c3a497831 am: b84c56f8db am: 878eb3890f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/async-task/+/1906970

Change-Id: I596a2ce69b9799d4222a7289ee360c13d70202b3