tree 3c5625b918c2c2eeaf867f09147b37543c3e9a0d
parent b879abd2747c1c1473c8d2b9d9c97707da8218f3
author Tony Wickham <twickham@google.com> 1447262738 -0800
committer Tony Wickham <twickham@google.com> 1449181086 -0800

Make sure pages are always accessible via left/right arrow keys.

- Handle NextPageFirstItem as first focusable item in reading order
- Handle PreviousPageLastItem as last focusable item in reading order
- Check the hotseat after the workspace in both cases above
- Dpad horizontal navigation (left/right) uses these as a last
  resort (Rule3) to guarantee an item takes focus if a page exists

Note that it is necessary to search for a focusable item because
widgets are not yet focusable.

Bug: 25591057
Change-Id: I953648bd76c657d660a38427fdd4108bf9963c23