ActiveDisplay: Force FULLSCREEN flag

* ActiveDisplay (AD) isn't as appealing when transparent navbar shows.
  Force FULLSCREEN and hide all decorations

Change-Id: I45d60db24ccd2c7c24bd0a3bd1dcefa4214dd67b
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>
Merge "ActiveDisplay: Force FULLSCREEN flag" into jb-mr2