Add new usage graph view to SettingsLib that shows usage with
same labels and whatnot.
Use that graph in the battery detail panel to show more stuffs.
Change-Id: I397b1314f65f668df566e93bdbc15420e1b3a280
Remove the battery saver notification and instead create a detail
panel within QS that allows it to be turned on and off.
Change-Id: I54654d26183586fa171fda04877a840701f8ef33