Add build files for pyserial am: 4745695a5f Original change: https://googleplex-android-review.googlesource.com/c/platform/external/python/pyserial/+/18802649 Change-Id: I028dbb5b23379ac1f7f99ccb588f8262c9caa759 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>