Issue #16941902: Charged % of battery is mismatching between phone status
area(top right corner) and battery screen
Need to make sure the stats are updated when we come back to
the foreground.
Issue #16901402: Crash in Settings observed after tap on Battery option
Don't allow us to have a null stats object.
Issue #16135174: Apps page "smoke" gradient footer must be removed
Finish tweaking layout to match mocks.
Change-Id: I29d56b506a9468ec548feef7c3f9502a9b16ef4d
