Make proc-macro-error-attr available to product and vendor am: e720490b44 am: ee061705d4 am: 1fdea0dd71

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/proc-macro-error-attr/+/2476392

Change-Id: I06b0640634a0878bcd9d7ac4d000486fd99bac24
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>