Cleanup cargo2android configs and patches am: c81820344a am: 64a9fd298e am: 157fbc6ef0 am: b93a37ea56

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

Change-Id: Iaaade3f3a4d43edaeefbbbd7262d0d84e7bfa4f3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>