Upgrade plotters-backend to 0.3.4 am: 9bbb63e272 am: d66cdd7ef4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/plotters-backend/+/2348425

Change-Id: I9b544513d8a7284cc425fc213e3f62c0e9ed80b7
Signed-off-by: Automerger Merge Worker <[email protected]>