Status bar size tweaks

++1dp for Data saver and Hotspot
--1dp for Total silence
>>1dp for Battery lightning bolt

Also implemented keyword "powersave" for `dispatchDemoCommand()` in
BatteryControllerImpl

Test: visual
Bug: 37013523
Change-Id: I027fd18aadeef5c49826c37db9f681c14175a3aa
6 files changed