Make either available to product and vendor am: e0d0c6826e am: 06d38426db am: 030c450d36 am: d5ddb2d3a9 am: 7e3c0a894f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/either/+/2476307

Change-Id: I2b11e74427f34983176c2641cce3d776c0fad56a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>