QS: Link the screen timeout tile to the settings

This commit simply makes long-pressing the back of the sleep tile (the
screen timeout selection part of the tile) start the appropriate
settings activity (Display settings). This matches the behaviour of
most other QS tiles where there are additional settings screens.

Change-Id: Ia36764f1a606cd3166a11516fe3709ce9bffd125
Themes: Make notification list bg themeable

Thanks Thomas Ekelschot :)

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Themes: Allow theming navbar bg color

Change-Id: I256afc30fc018ea752769029c5246bc7310c23a6
QuickSettings: Refresh RSSI tile on tap

When tapping the RSSI tile to disable mobile data, the indicator
would not show immediately because the view is not updated until
the next signal refresh.  Refreshing on tap makes more since so
that the user sees instant feedback.

Change-Id: I70d3e08e9a4af4f5d764d8c90cbaf944f4f25139
Signed-off-by: Evan Anderson <evan@thelinuxman.us>