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>