Add metadata files for plotters-backend. am: 3da56e3c5b am: 351eee5932 am: 28f19a9e7c am: 6fbe9993f9 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/plotters-backend/+/1621410 Change-Id: I807d395850ebca504a332d7ecc4e3ebdd32c185c
This is a part of plotters project. For more details, please check the following links: