Add required info files at the top of external/ply

Bug: 69316449
Test: ls includes these files
Change-Id: Id7bf6288c7de542f3577c1ca0e4d50307ff7e2f2
4 files changed
tree: 153bfb4ddb487482696be39f03e0b103e0f22716
  1. ply/
  2. LICENSE
  3. METADATA
  4. MODULE_LICENSE_BSD
  5. NOTICE
  6. README.google