Add metadata files for criterion-plot. am: 97cce95c03 am: 418e386b7f am: 48bd54afef am: 5b2ab5b6b2

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/criterion-plot/+/1621101

Change-Id: I01a7ce45068c7113789bd9daab697b35de27a7ac