Dream complications styling update.

- update complication weights so home controls, media entry chip, and
  smartspace are always shown below the clock
- instead of applying the bottom padding to home controls at the layout
  engine level in order to center align with smartspace, apply to the
  home controls chip view, which prevents the layout engine from giving
  an exception to adding padding to a root node

Bug: 259264239
Bug: 259719867
Test: https://screenshot.googleplex.com/BZNatvxHFHxqxaS
Test: https://screenshot.googleplex.com/9gxsLUZWTFy7sGX
Change-Id: Icfcc3653ad7eb52e707c8289803188388484666e