Fix some print UI issues.

1. Fixed a crash when orientation changes and the content
   is scrolled due to wrong size bitmap being requested.

2. Closed a file dscriptior that was being left open.

3. Clearing the bitmap before passing it to the renderer to
   ensure it is white for pixels not touched when rendering.

4. Removed debug logs.

5. Switched to the correct layout manager for RecyclerView.

bug:16966145

Change-Id: I8ab9d22635c93cac5ff85c6f4b5d82e58cd8df5c