QS: Add dock battery tile (1/2)

Add a dinamic tile for devices with dock battery

Patchset 2: New icon set
            Rebased

Change-Id: I5e0e84da0b0f248fa9eb568c5d506b00cf3998b0
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_frameworks_base into cm-10.1