am eb81de1d: Merge "Native 16x9 viewfinder stream for Gcam to reduce switching jank and eliminate black bar overlay hack." into ub-camera-glacier

* commit 'eb81de1d250a5c61f378428f590238ce5c7e16a4':
  Native 16x9 viewfinder stream for Gcam to reduce switching jank and eliminate black bar overlay hack.