Cleanup cargo2android configs and patches am: c81820344a am: 64a9fd298e am: 157fbc6ef0 am: b93a37ea56 am: 3579d2dc58

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

Change-Id: Ifcae722c671828dba4be3e67254ecb011b3c0d25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>