Use the existing PointerEventListener infrastructure to listen for gestures that look like flings and hint to the power system when they happen. Since we don't actually have a bound for the fling like a regular application would, limit them to five seconds and refresh every time a new fling is seen until the five second time period is up. bug 24059298 Change-Id: I5757a1e88f2ab2ef08cccefa8221d809ae71bb6f