Update the chargeLabel when battery level is full

Before this cl, it will show "100% - charging", which doesn't make
sense. This cl removes "- charging", and only show "100%" in this
case

Bug: 62559153
Test: RunSettingsRoboTests
Change-Id: Id124fe4098e21b4a69c4a7d3d522fa227faab65d
2 files changed