Make plotters-backend available to product and vendor am: 9a88beacaf

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/plotters-backend/+/2475780

Change-Id: I21f24bd37fd8ecd370829e2d35e0e607fcdc2d3b
Signed-off-by: Automerger Merge Worker <[email protected]>