Add build files for pyserial am: 4745695a5f am: e481909540

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/python/pyserial/+/18802649

Change-Id: I8baad91ef71d03e3de654104395cf4bddd04f5f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>