Fit and finish on status bar:

  - Clock color fixed. [3374581]
  - Clock vertically aligned. [3388224]
  - Clock uses system font assets now. [3385564]
  - Solid version of AndroidClock added to build. [3385564]
  - Extraneous background glow removed from notification panel.
  - Removed solid black background from notifications. [3388223]
  - Added background image behind large notification icons
    and increased large size to 64dip [3388434, 3384355]
  - Corrected size & leading of notification text [3388577]

Bug: 3374581
Bug: 3384355
Bug: 3385564
Bug: 3388223
Bug: 3388224
Bug: 3388434
Bug: 3388577
Change-Id: I8e443da5758deca412d1ce5944f887b35f6265ed