Upgrade pdl-runtime to 0.3.1 am: 2f616e0485

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pdl-runtime/+/3174223

Change-Id: I338e1e7a728b4ad44fb356183141c6b810a4c425
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>