am b83d8f15: am f5cbe002: Merge "docs: update template and css for android u Add a custom version of docpage.cs to the droiddoc template, because it adds a good deal of custom design and behavior (instead of updating the doclava version of the file). Add CSS for next/

* commit 'b83d8f15ccc276b190a6c02002f6af94aa2e9cb4':
  docs: update template and css for android u Add a custom version of docpage.cs to the droiddoc template, because it adds a good deal of custom design and behavior (instead of updating the doclava version of the file). Add CSS for next/previous links in android u lessons and revise style for download button.