Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Add missing newline at end of tools/BUILD
  Format Java files with google-java-format
  Update external dependencies
  Revert "Remove Tika dependency for uploadvalidator"
  Add test for mime type detection

Change-Id: Ie57e47d1737b1bd2f367c7f62c32591456e5071a