Use Chris Bane's PhotoView in full screen image activity.

- Now there is zoooooming!
Use PhotoView directly in layout. Disable second+ auto-hide.
Fix SystemUiHiderHoneycomb flag checks.

- Also add LAYOUT flags, so the layout does not change when the status
bar and action bar hide/show.
Fix zooming triggering system ui state toggling.

- Use PhotoViews setOnViewTapListener() instead of setOnClickListener().
Use scale up animation when opening fullscreen images.
Beef up action bar in fullscreen activity.

- Enable up, goes simply back.
- Enable title and subtitle support via InitBundle.
Get rid of fullscreen theme, set all in code.
Using less translucent action bar in fullscreen mode.
Add touch feedback on show poster.
Merge branch 'zoomable-imageview' into beta