Deprecate VNDK v27

Remove the code for old VNDK snapshot v27. The script also checks the
minimum VNDK version it supports.

Bug: 159433338
Test: python3 development/vndk/snapshot/update.py \
      --local {snapshot_dir} --use-current-branch -vv 27
Change-Id: I00587ab3e6c97df7d43e81aaa8795042f89aaf3e
4 files changed