Rebuild quick settings tile layouts.

The chief motivation here is to allow two lines of text when
necessary. So much refactoring over so small a thing, but
the result is satisfying: most quick settings tiles do not
need their own layouts. Additionally, tiles with odd-shaped
icons (I'm looking at you, alien potato mode) no longer fall
off the grid.

It should be possible to further reduce the complexity of
quick settings, but for now this will suffice.

Bug: 7216734 // vertical alignment issues
Bug: 7216868 // wrap text in QS tiles
Bug: 7365911 // NPE in some tiles
Change-Id: I0c6ef275e44f745dfac52c2a7303072ae48e3873