Add build files for pyserial am: 4745695a5f am: b53053cfeb am: deaf17dd80 am: dd6d64bdd4

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

Change-Id: I50dd2c8ae0f145763898861fe34043b5ec18a7ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>