Mark ab/6881855 as merged am: dd98c3d6b4 am: 4705e1173e

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/rust/crates/proc-macro-error-attr/+/13112864

Change-Id: I18e392d1a89b5f1d09c50fb22375b9baed6209f5