Move py-markupsafe to src folder am: 2712506a26 am: 400f1b1623

Original change: https://android-review.googlesource.com/c/platform/external/python/markupsafe/+/2218824

Change-Id: I42433bea80c6f9a951c44d02c47058d0c878fea0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>