Show dock battery level if available

Updated for Jellybean.

Change-Id: Iabfd12eb327a9fe32ffa46eea5c9038263e105a9
frameworks: add dock battery drawables for HDPI devices

Change-Id: I8cc2cfc74548693ffbdd48447d7fa414fd451f59
Merge "Show dock battery level if available" into cm-10.1
Merge "frameworks: add dock battery drawables for HDPI devices" into cm-10.1
Merge remote branch 'cm/cm-10.1' into cm-10.1