Cleanup cargo2android configs and patches am: c81820344a am: 64a9fd298e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/either/+/2751242

Change-Id: I5fa0037d2367e275c60ae2d394b20389d17946b0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>