Add build files for pyserial am: 4745695a5f am: b23ac7d8c0

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

Change-Id: Ic9d509b49ee27ffa0563cc4597ebf163c857a352
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>