8ed2b97b9e
For light idle mode, our maintenance window is pretty short (1 minute). Usually we have nothing to do in it... but sometimes we may want to do a sync or download that takes more than a minute, and it would be nice to not take the overhead of breaking that up in to multiple windows. So now we have a flexibile window, from 1 minute to 5 minutes. We start out with 1 minute, and any window that uses less than 1 minute increases the available window by that amount for later use. If we later use more than 1 minute, we correspondingly decrease the next available window. Change-Id: Ie273dbd5843b3aa4a3d5d9b2e420cda75517340f