Preview lockscreen preview image in detail view

Change-Id: I9b2c87de906723aedf49833fac9d00f3b5d698a3
Replace sliding panel with scrollview

This allows
1) Sliding of the drawer to happen in the theme viewpager
2) Seamless sliding from viewpager all the way to the bottom most
theme component checkbox (sounds).

Also clicking the viewpager now expands/minimizes the "drawer".

Before this patch the UX was a little awkward since the theme
components were in their own scrollview. A user could not scroll down at all
in the theme preview viewpager and would have to use two swipes to
get to the very bottom.

Change-Id: I1a0a30edfdd29d56db0aa40d06114f8bbaa39331
Add a page indicator to the theme preview screen

Leverages Jake Wharton's ViewPagerIndicator

Change-Id: I17c5ff60a7a2d62fa8fcf652382dcfcd807d0397
Don't add components that are disabled.

Change-Id: I7163186143b930d47e26d4e748cb74e408860302