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

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

Change-Id: Ibad871eeb68e57f31e4119f94061613ce10cceb5
Signed-off-by: Automerger Merge Worker <[email protected]>