Fix inconsistent connected without charging state in the Settings

Make the "connected, not charging" state condition is the same between
Settings main page (in the TopLevelBatteryPreferenceController), and
sub- battery settings page (in the BatteryHeaderPreferenceController).

https://source.corp.google.com/h/googleplex-android/platform/superproject/main/+/main:packages/apps/Settings/src/com/android/settings/fuelgauge/BatteryHeaderPreferenceController.java;l=116-119

Fix: 285204150
Test: make RunSettingsRoboTests -j40

Change-Id: I9b09d521ca71b18e180c779f1a048d1ea4ba161a