Merge "Make libproc_macro_nested available to DnsResolver" am: b861406a39 am: 39842e470b

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/proc-macro-nested/+/1742036

Change-Id: I90f69221d993c69b40f33e20655ee7c44fc9bf56