Move py-markupsafe to src folder am: 2712506a26

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

Change-Id: I9871b7169edf39429f5c53d8cfa81f999d85d02d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>