Update Grant Permissions dialog to redlines

Changes:
    - Refactor the ViewHandler a bit to be more generic.
      This should help with another upcoming Wear dialog.
    - Update assets for buttons
    - Add deny asset
    - Fix margins and other UI number tweaks

BUG: 24133550
Change-Id: I330bdf3217fa5c554f71d9105a0475106b6f3e12