Add build files for pyserial am: 4745695a5f am: b53053cfeb am: 78c857e2be

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

Change-Id: Iec0ab801fcb44bbe34347d8e800bffa6d0fdd8b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>