Update UsageProgressBarPref icon when device is charging or low battery

 - Add new icon for battery low state
 - Update UsageProgressBarPref icon when charging or low battery
 Screenshots:
   https://screenshot.googleplex.com/9HBvV6t6dVsG8eD.png
   https://screenshot.googleplex.com/6TsRu6BTN338FvT.png
   https://screenshot.googleplex.com/nGE29cfsmgKuuaP.png
   https://screenshot.googleplex.com/85NWXSg2PevXAsy.png

Bug: 179237746
Test: make RunSettingsRoboTests -j40
Change-Id: I057874bbf45594c90466cf346b054bf033815dac