Forward port battery icon options [1/2]

Bring forward the various battery icon options.
Portrait, Landscape, Circle, Text.

Still retains new options for where to display battery percentage text.

Change-Id: Icfc14d989eebde9014538291c24aa76d328df234
SystemUI: Update WiFi indicator drawable sizes

Resize both the activity arrows and the signal strength indicators so
that both are properly centered and overlay correctly for all screen
densities.

Change-Id: I7e95adcdc110995504534a58eb0df42ba132bc97
Merge branch 'cm' into HEAD