SystemUI status bar/quick settings updates.

Status bar:
 - Update remaining mute/speakerphone icons.
 - Remove orange versions of wifi/signal icons.
 - Use only full versions of data type overlays.
 - Remove obsolete light versions of data type overlays.
 - Low battery color back to red.

Quick settings:
 - Update to indicate problem (orange) status.
 - Update to new battery style.

And a few remaining xx assets.

Bug:10680149
Bug:10502089
Bug:10729729
Bug:10316062
Change-Id: Iccd936d90271e4ec5c48e688917225136e7d45aa