Merge branch 'stable-3.2' into master

* stable-3.2:
  Replace tika by overviewproject mime-types to detect mime types
  Upgrade bazlets to latest stable-3.0 to build with 3.0.13 API
  Avoid any uses or lookups of ffmpeg by Tika

Change-Id: I7ae798e93ffc218927d63aa2a709688c9a599133