Hide summary for Cell in PowerUsageAdvanced

1. Add method "shouldHideSummary" to check it
2. Also change method "shouldHide" to "shouldHideCategory",
to distinguish it from shouldHideSummary

Fix: 37293815
Test: RunSettingsRoboTests
Change-Id: I4364d0331f3aac143fad9ebdeab52207f5cb98bf
2 files changed