Fix python 3.11 compatibility am: 58c5a33bda

Original change: https://android-review.googlesource.com/c/platform/external/nanopb-c/+/2726973

Change-Id: I9cb3f2316ea88ae7fcecefeddfecca83ed1a27f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>